Malicious PDF — malware analysis report

Static analysis result for SHA-256 62214be26366ee24…

MALICIOUS

PDF

78.9 KB Created: 2021-09-04 17:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7ee3e28d083e6b8766dfd3302f3bf53f SHA-1: faeea4bb6d4516109e5036113c727534780a8095 SHA-256: 62214be26366ee241a6f16f2ba00cc07b24f755684b6a3a1925c8d24658ee4ae
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The `PDF_SEO_DISPOSABLE_LINK_FARM` and `PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM` heuristics confirm this behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6335

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://goodwill.pl/userfiles/file/mobovavaf.pdf In PDF document text
    • http://design-klasse.de/ckfinder/userfiles/files/xemefovudetefi.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16112a5d041825---sokowizetovalevubedit.pdfIn PDF document text
    • https://firesystem.ro/imagini_ws/visadoletupixukegeburuwut.pdfIn PDF document text
    • https://unique-u.biz/images/uploads/file/84863537745.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/vinopum.pdfIn PDF document text
    • https://biocoils.com/img/file/11498276903.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f602d9ba0e---winexuzudakimed.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/58077068263.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c29d9361daf---gonobedamoreberekav.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/68974944162.pdfIn PDF document text
    • http://hockjoohin.com/admin/uploads/file/kozako.pdfIn PDF document text
    • http://korealabels.com/ckfinder/userfiles/files/getafugipux.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/534a03db30f61f4531f5113e8e66c2d0/kebopeforuxaverujonoxepa.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/qlids8vp43gbamfqsh3o7luk2k/sutununigujenumu.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/499b898e424ae059bb47cd1f28aa1994/kunubufovofugawukapipana.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/rixunesobinasapedu.pdfIn PDF document text
    • https://alves.bg/ckfinder/userfiles/files/nuzovuzutazemudej.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/84104304801.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb36e798d88---91830981339.pdfIn PDF document text
    • http://www.centralperdana.com/file/30859818237.pdfIn PDF document text
    • https://remont-bez-zabot.ru/files/file/42497007642.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=choque+inelastico+ejercicios+resueltos+pdfPDF link annotation
    • 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.

FilenameKindSourceSize
font_00_sfnt_off0000d78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78D 11124 bytes
SHA-256: 4924aec61814c6bcfb18755305c78bbe4636480712c7c7f9635df10ccfa42f91
font_01_sfnt_off0000f13d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13D 20464 bytes
SHA-256: d79a1b63959b703a224fc82363d0fbcc0333585867e3dd51e4dbddb0c92eda48
font_02_sfnt_off0001257a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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