Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab26339b969035c…

MALICIOUS

PDF

96.8 KB Created: 2021-06-25 23:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 093ae4fae86014d1e4c84886a7b6b5dc SHA-1: 98dfed3b89fbd0470a151427be1761efb466e1da SHA-256: eab26339b969035cf778143098a01d9e242a478b77a834688b4b6fdaab899cd3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many pointing to compromised CMS uploads, indicating a link farm designed to distribute malicious content or phish users. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or malware delivery. The document body is unreadable, but the heuristic findings are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://huntic.ru/uplcv?utm_term=adrastos+name+meaning PDF link annotation
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/cdf9e04045aac8eb5be618d2db231e99/46078054282.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/dijibolujuri.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/27167803791.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/58ec4cb8df7649fe29b5390b224c7c10/kofip.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/jimamisumogur.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0d355ea5c---mufesezojokiwemo.pdfIn PDF document text
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/14383457526.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/riguwidexibovi.pdfIn PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/jotejarerigifabujadi.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/penuvexasulekebifexufomon.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/cf28d92b4527d514b42a643ef4b46d90/77656552253.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/da3cbfcf16e73f045370df366871cac5/karekoruvudamozin.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/nokudumuzudo.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a5241a97d04cc42bb47522884b5e3ed2/duganolijojakasim.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/39773584286.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/654ca43233c3829c50fd65b96c149011/terekezupenituvolivuxuf.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/otpnqon3c5j238tk78i1r23hai/34459139114.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/8e7bc4de2af24a8fec85a08ee8188288/jokujakiveniderog.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a62e1a1c0fa---xexevuroxirojidamili.pdfIn PDF document text
    • http://nuovartea.eu/userfiles/files/53945129757.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb51f1a7ebf---68582750603.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/53759796578.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EEF 10528 bytes
SHA-256: a37efb38ff086247af82825e97bd8b618fa07c4ddfa917c27ca15e764f9f3142
font_02_sfnt_off000146ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146AB 18756 bytes
SHA-256: abd978fc035e5da6056e7ee7142fb88ba43f12a894bbcd9ddbe2c63f09bfb72f

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