PDF malware analysis — malicious · 2bd3846a8bd1261d

MALICIOUS

PDF

93.2 KB Created: 2021-07-06 15:02:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: d7b0d999b27b3faeb6dbc555ec3fa42b SHA-1: d650bfbcbf82009221eeb0da947f605f56006aec SHA-256: 2bd3846a8bd1261d65efbf1e8d31e970d084bc6e07a0d69ccd3d6309e7ae514c

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the presence of numerous links to potentially malicious PDF files is a strong indicator of a phishing or malware delivery campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9924

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/6b63a0dfa606470242b28f33c02e374c/45701579073.pdf In PDF document text
- http://aj-logistics.com/stock/userfiles/file/10217832690.pdfIn PDF document text
- http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5a2bead54---guroregixibozono.pdfIn PDF document text
- http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0a147d8e9---60612302427.pdfIn PDF document text
- http://aircond.md/upload_fck/file/nutaf.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df0ac6dffc---94843096720.pdfIn PDF document text
- https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f15a7cec2---wofebofeb.pdfIn PDF document text
- http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608630e32afd4---83909285556.pdfIn PDF document text
- https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/947aeb8d1bc32da0ef649bd905d6bebc/tazinisef.pdfIn PDF document text
- https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092687e60436---62412386793.pdfIn PDF document text
- http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2a4f5c5cf8---nasimivoz.pdfIn PDF document text
- https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16072bf110c5cc---vusokiwofupi.pdfIn PDF document text
- https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/36c9u306iojean9t2val7vs803/degupuwalesapubixibod.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a1c80cebf---jiwej.pdfIn PDF document text
- http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/oerdbkl1fkaabbp0mcir3jr6h6/69026881743.pdfIn PDF document text
- https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc9038b067---8155823199.pdfIn PDF document text
- http://thetownsendfamily.net/clients/a/ab/ab79602242cca8f930cd52af13df1d51/File/28416579172.pdfIn PDF document text
- http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acfffb16f66---15202585335.pdfIn PDF document text
- http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/t6tqqb83q2m2oi21n34fp7l2q5/4605440714.pdfIn PDF document text
- http://zerosquareonline.com/file/31209050852.pdfIn PDF document text
- https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/5788c02f5ba7ef56cebfc5d5e95f302c/kirodetu.pdfIn PDF document text
- https://luminex.pl/upload/file/62932213369.pdfIn PDF document text
- https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/55e97d493c88261d423dda1b56e2394c/xofatoredeleguzuxebujet.pdfIn PDF document text
- https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba82bd8d381---xedivaduwalogotunaji.pdfIn PDF document text
- https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160942076640f5---kogavasowupomuso.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=present+continuous+tense+worksheet+for+grade+3PDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f03f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF03F	16336 bytes
SHA-256: `adf38969d40f501586e0caf93d33991e243baeeecfe575c4831cdbf64b7044fa`
`font_01_sfnt_off00010641.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10641	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011e53.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E53	16996 bytes
SHA-256: `b76b2507580f9e8b3e5dfe68edeb1092dd8c064b279ba0edc33aec832c5e3a69`
`font_03_sfnt_off00014abe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14ABE	11160 bytes
SHA-256: `ea8a32109445ccdcb7e9e090690071f6d501ba9a6aef360bd16ea2e5fef5597f`

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