PDF malware analysis — malicious · 68e79f157c2d3db5

MALICIOUS

PDF

85.8 KB Created: 2021-06-29 08:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: 047d71e3d128d103483983688f5da301 SHA-1: bc9fa84e40cb6e251cb25f1222bd8110e9961188 SHA-256: 68e79f157c2d3db53d0a11d2767b7335a387e0796e8edbfbe59d187fd050080f

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised websites, as indicated by the 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and link farms points towards a phishing or malware distribution scheme, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://eotp.info/sites/default/files/fck/file/43426509863.pdf In PDF document text
- https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/bb8aa1b26cc6806b9d607508db1f3ceb/rimululopoxofu.pdfIn PDF document text
- https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc235073475---4762992359.pdfIn PDF document text
- https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/b8af87125f022180a413d9dde934ee80/zuzukufenezuvu.pdfIn PDF document text
- http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/0607664bb6d50110bc8d14a4245269bf/newoveseximupawufes.pdfIn PDF document text
- https://capital-tic.com/upload/ckfinder_temp/files/20210528140115.pdfIn PDF document text
- http://pallenberg-busreisen.de/uploads/files/boxeralozozadekomases.pdfIn PDF document text
- http://bennyhigh73.com/clients/3/33/33ce00c6a031cf3b17a3dcf69aaa7594/File/xanozulufofu.pdfIn PDF document text
- https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/cf793d3b4820725c97cc6924b9d46b35/71457497847.pdfIn PDF document text
- https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/85h0aagqmclkltc2mb0chmi02f/11745820648.pdfIn PDF document text
- https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/t5o3gil0nardj5vc4le11autg3/zivewomirutoruk.pdfIn PDF document text
- http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df5f68dbe8---90431214671.pdfIn PDF document text
- http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ac117bc61---zosizoxupesedebaw.pdfIn PDF document text
- http://akademia-jedenastka.pl/zdjecia/fck/file/64612410603.pdfIn PDF document text
- https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b198ce3a91c---fedagudadubumenaj.pdfIn PDF document text
- http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609218ca147e3---84096992901.pdfIn PDF document text
- http://studiotecnicoarduini.eu/userfiles/files/womin.pdfIn PDF document text
- https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/10b6rniq3kkekatjjctr8km9a5/9873463847.pdfIn PDF document text
- http://waterreducer.cn/d/files/kuwulebege.pdfIn PDF document text
- https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d779e3aa913---zanuguxigoxibusizasew.pdfIn PDF document text
- http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077067c3e369---livubeboz.pdfIn PDF document text
- https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/98e282a118f51906adcf9ee63cb7d513/9212427947.pdfIn PDF document text
- http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af3bcd2fbc5---bozakakavalideji.pdfIn PDF document text
- https://bhsbeacon.com/FCKeditor/file/bosawimefojox.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=abstract+reasoning+ability+testPDF 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_off0000ed6c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED6C	16940 bytes
SHA-256: `8a18ab40dfa31a88b4b150415233dc9ca0531d8774a1f19424bdbe5afde0e5e8`
`font_01_sfnt_off0001196f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1196F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013186.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13186	10640 bytes
SHA-256: `3db294fc787e1f6323e0351d62fc3b1a6860fa81b3a3ec733a4f4858fd9f32db`

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