Malicious PDF — malware analysis report

Static analysis result for SHA-256 f017e63c123f40db…

MALICIOUS

PDF

78.1 KB Created: 2021-08-27 19:55:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a6297f7d436fc353d0d6e6025966d1d6 SHA-1: cf57d4284e5fd9f09f7d42f9c676f61fe8c76e04 SHA-256: f017e63c123f40db7292477e33b2d44944567baf8d220b6a0942753ae34e2da2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The document contains a large number of embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://nomylo.ru/uplcv?utm_term=general+conditions+of+contract PDF link annotation
    • http://qunjl.com/userfiles/files/bakubovukanizimuzuzazum.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/sh2s96c9dj2j1l0nq7jm2nrbt6/89291575011.pdfIn PDF document text
    • http://gfhs1978reunion.com/clients/56625/File/tonipekadutamaxivatuwe.pdfIn PDF document text
    • http://funperm.ru/content/file/getabobuxo.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/15136833228.pdfIn PDF document text
    • http://meuble-tunisie.com/userfiles/file/58275329365.pdfIn PDF document text
    • https://10glazsikeyrosa.ru/file/nefebe.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/c63099da1943c2603c21b62792f27f9d/19448008257.pdfIn PDF document text
    • http://kath-kiga-bw.de/bilder/berichte/file/32603394247.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16084ae76805d8---regazamaduv.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/13f7861584d2512fbe376d59c34bb08f/rarujivefaraduxeb.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/71448655972.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ee53505d554---xiloj.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/fugoraduwijerevak.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/60486584611.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/lokazow.pdfIn PDF document text
    • https://scriptdd.com/_file/file/napejowibi.pdfIn PDF document text
    • http://labotinnghia.com/img/files/3589503605.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/jusesejupivibufabade.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/75889611727.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/50069a47ff92a27730bfd4c29b51849c/zuxavipe.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4e4f2654b---9432751610.pdfIn PDF document text
    • https://agatanorek.com/files/file/93456372977.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_off0000ccc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DA 17788 bytes
SHA-256: 59bb55098fbdde626666dce299746e4b6b1d966f042ac74945a4c2d216a1bd9b
font_02_sfnt_off000112f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F7 10508 bytes
SHA-256: a47066463c90b87eacc557aa5f83229e01557938063766bc71a0f6216bbb3a70

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