Malicious PDF — malware analysis report

Static analysis result for SHA-256 9010298ef7989443…

MALICIOUS

PDF

105.5 KB Created: 2021-08-21 19:35:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 74bd771e9f734e087388f2cc7d0cff20 SHA-1: 6635f8e6bace66938507cc0b6e7471e71a58a6a6 SHA-256: 9010298ef79894430728c6c38adae5d0de921fb0baa620f82c6e6c2379d8678a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a URL with a 'utm_term' parameter related to password resets indicates a potential phishing lure. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • 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.
  • 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://garglob.ru/uplcv?utm_term=how+to+reset+my+texas+benefits+password PDF link annotation
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd62738f75---jufufewufenodewupafijuw.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160707613df4fe---73055717078.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/64769681174.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/98931762439.pdfIn PDF document text
    • http://delvalle68.com/clients/54584/File/vuxuvinarosopiwogak.pdfIn PDF document text
    • http://mldinsaat.com/image/files/fisozizabetiwapubedaret.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961cba1d1fa---89405032742.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086e8dcce792---wutufudusolibiragarilaba.pdfIn PDF document text
    • http://beergolfers.com/blog/images/file/19763408900.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/23430219614.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210706_1C4A77BBD1287E9B.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf65d3428a---79527568693.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/33545318405bca951a97c608e4606f0b/36623339693.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/247aqk8nknqfm6ui4ajffotdu4/tenolavuga.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16120146ddae0c---1549675083.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a332232541a---6996832491.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/e79fb769a2614cd157430b7d0bafaacf/56692959659.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1610c24da59d0c---lexizidinep.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/tekofawodatopunibavidoni.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/kosoguwo.pdfIn PDF document text
    • http://bipaf.org/2009_home/upload/editor/file/susof.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/dufubimijasibijosuvu.pdfIn PDF document text
    • http://nnhs1964.com/clients/a/a2/a2d7b74ded15306de89ee4bbe2f7ed3f/File/duzadobekuxodojegasix.pdfIn PDF document text
    • https://csodamalom.hu/files/files/12117653478.pdfIn PDF document text
    • http://pima-alarms.rs/slicice/file/gisatutuzegaposozez.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_off0001353a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1353A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D51 11044 bytes
SHA-256: a3306bdf06154ef7d41e359fdbb7ab4f91e64d7c517e1227483ee6a17c5b7c22
font_02_sfnt_off000166e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166E7 18388 bytes
SHA-256: 1717098ed192162d75206ee64a8bdd963fc24015bd9964b3aa2e114e6d485d6e

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