Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f4647c38076cf38…

MALICIOUS

PDF

87.7 KB Created: 2021-09-20 02:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 99683b79f2640286c5e4008d0a2a48a8 SHA-1: bc427940715565e9a4f6d6f5cbc4507bf2405c95 SHA-256: 0f4647c38076cf38eefb2c68a2d7ae98ca4d1254a7e98d5c12316f3767901e1d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely leveraging embedded JavaScript for redirection or obfuscation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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
  • 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://drafthe.ru/uplcv?utm_term=how+to+block+website+on+phone PDF link annotation
    • http://sgd42.ru/userfiles/file/fomugevibarubabetaxin.pdfIn PDF document text
    • http://virtuozi.ru/sites/all/sites/virtuozi.ru/files/97412691578.pdfIn PDF document text
    • http://nhagiatxanh.com/public/default/ckeditor/files/motovovofumonowimuteterud.pdfIn PDF document text
    • http://moneymaker-gold.de/files/94660870302.pdfIn PDF document text
    • http://supair-lux.hu/ckfinder/userfiles/files/numigufumugilotefepi.pdfIn PDF document text
    • http://adamslakeband.org/userfiles/file/12465525109.pdfIn PDF document text
    • https://creativenursery.net/home/creative/public_html/ckfinder/userfiles/files/63763317045.pdfIn PDF document text
    • http://cjmfgxfollow.morefriendship.com/upload/files/73401435978.pdfIn PDF document text
    • https://petpetmates.com/files/editor/file/puzomodevosozipovupetido.pdfIn PDF document text
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xivakubijemerowiguxosa.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/5742a6f5f154b7c1b3affe9f227881f9/9413117861.pdfIn PDF document text
    • http://guowangcable.com/d/files/duxosugosisuxu.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/1340672269.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/fuxelozisifaxoziwoxirixu.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/ji79ves2irepp310ccc6a837iu/95220504287.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614174e0816c5---12240481241.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021092001210873499.pdfIn PDF document text
    • http://parateam.cz/file/dibujesurixivasapelodovo.pdfIn PDF document text
    • http://thietbimaugiao.vn/Images_upload/files/vumawitukoxuji.pdfIn PDF document text
    • http://wijnhuis-vaessen.nl/site/data/ws/files/37229230874.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614689258658a---kevituxarixofimi.pdfIn PDF document text
    • https://vokalensemble-vocembalo.ch/userfiles/file/wixepi.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/09/files/210915224128.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/62c3ba051da1f9275f0c615aac48a6a2/xilubisoz.pdfIn PDF document text
    • http://cosmoscm.com/contents/files/rewodileberifibojiwuwebov.pdfIn PDF document text
    • 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.

FilenameKindSourceSize
font_00_sfnt_off0000f22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22E 18332 bytes
SHA-256: 4bef1585834952020146074f1def1a9ebe4e1f2c7f18794eb216e68f321219c1
font_01_sfnt_off00012171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12171 10520 bytes
SHA-256: dbe25057ffc333d58df754f405d50ecc1b0141dde0ea3364aeca9e505fd66a2a
font_02_sfnt_off00013922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13922 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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