PDF malware analysis — malicious · d037d760ef026f55

MALICIOUS

PDF

86.3 KB Created: 2021-08-04 00:20:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04

MD5: 58df7c3d0de943973865ce015964f388 SHA-1: b195e8a95b13a4aa0ba04d52bd3cf60e6a724f53 SHA-256: d037d760ef026f55d4ea8f4df8ccbcda9cadc033b088c646000469d409bb0d86

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9911

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 http://smart-ventures.ch/upload/Editor_Images/files/81376316250.pdf In PDF document text
- http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/tm100of0oqmi8icijk7p1n1gd3/60255553507.pdfIn PDF document text
- http://baihsad.com/userfiles/files/20210712_211648.pdfIn PDF document text
- http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16106dad346189---foxopozapilajevibupibi.pdfIn PDF document text
- https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/3e257d05880813bb0950009f6e5f2afc/22033178754.pdfIn PDF document text
- https://feng-shuiworld.com/userfiles/file/87264199190.pdfIn PDF document text
- http://www.tokyomagic.jp/images/library/File/1017611406.pdfIn PDF document text
- https://aspaeng.com/files/image/files/92811468666.pdfIn PDF document text
- https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/d0m464bfv0j3eiua4qci78iu77/83679255666.pdfIn PDF document text
- https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/7bdd1d534bb4f6432e6966596190d5ba/xadogitofemafepu.pdfIn PDF document text
- http://www.rafaellucenaehijos.com/ckfinder/userfiles/files/sikagavomaki.pdfIn PDF document text
- https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a081e6af73e---3148970639.pdfIn PDF document text
- https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/icb46gpa6u16hifconglrvj9e8/81664278669.pdfIn PDF document text
- http://chikatere.com/Upload/files/vifutiwiru.pdfIn PDF document text
- http://animalscipublisher.com/files/upfiles/file/1938541507.pdfIn PDF document text
- https://angkorphotographyguide.com/userfiles/file/tizoj.pdfIn PDF document text
- https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/529235341d0c908fb3757965974bf7a5/73141227162.pdfIn PDF document text
- http://szao-spb.ru/images/news/file/33969026797.pdfIn PDF document text
- http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eff22269d1---suleraxijitabisinul.pdfIn PDF document text
- http://lex-ter.ru/admin/ckfinder/userfiles/files/22079440112.pdfIn PDF document text
- https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/3553aadd639a44dff350438cb3293915/vojunagupolexe.pdfIn PDF document text
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4f4a7f433---92928581558.pdfIn PDF document text
- http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/n1jpcq0mldlnbgm3lcdfeq8fg7/4471369190.pdfIn PDF document text
- https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/mtaebr2qhhnavcp86iknqt6h82/67365802887.pdfIn PDF document text
- https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/13cf51cf996bb1835c11aded1097de73/pisadatavoturutixuda.pdfIn PDF document text
- http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070d12421f7c---66000728368.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=what+is+the+formal+and+informal+definition+of+vengefulPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e9aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9AA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000101bc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101BC	17836 bytes
SHA-256: `d12dba36334c64cc662b9a76f6608b9d608b4f6573c1e5110f01522a0eb53ee8`
`font_02_sfnt_off0001309d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1309D	10960 bytes
SHA-256: `e6694ca683e21ba48d5f03029855580ffd439026038941f927ea5d0b74fc06f2`

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