Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be6fa569bb4288d…

MALICIOUS

PDF

105.8 KB Created: 2021-09-02 08:35:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 50353791e7020b8f5380a0b191910498 SHA-1: 4c157319c22145494119ecddba8d6a36d9cda628 SHA-256: 7be6fa569bb4288dbd99b4b016cf26681ae2f682eb1ff5d58b8765d618ac3877
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and disposable hosting, likely intended to lure users to malicious sites. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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=in+the+history+of+technology+computers+and+calculators PDF link annotation
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609858a8dbf0a---74843363364.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/fenisesoxavijunogos.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/e25c23f326ff3ea40de3a852e3c32d64/mekuvasafetovepuxoze.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a440377bcf4---zifozagodemebunibu.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c40d044e5f5---bojebeda.pdfIn PDF document text
    • http://beauty214.com/uploads/files/202108202215215295.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/mirefonejavuminokus.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/mogifu.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/70973513816.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfcafd6158---51891818817.pdfIn PDF document text
    • http://m-s-g.ru/userfiles/files/47731005773.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/7a313185f569911d9d5fdcd72a1c25bf/39052703871.pdfIn PDF document text
    • http://blbr365.com/userfiles/file/1625251538.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160972e4aca143---97711536283.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/64996010678.pdfIn PDF document text
    • http://tylerdaynursery.org/clients/8/8e/8ed7c4ff1d995b028c1180c1bccb3f4a/File/tevipinu.pdfIn PDF document text
    • http://archimax.ch/dynamic-images/cms/file/17258424645.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d733ae8e87---mivemigozukemesaf.pdfIn PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/3324523268.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/2c50a668f94604c74ec07105a44163be/xoxemubafemafedawoz.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16080f749c5a7b---38480133144.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/6eae631b0b4df6ca51eb20930b4d2bfa/42323040138.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/vawabarusilujebiliruki.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_off000134a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A6 19408 bytes
SHA-256: 049f4c444413a2c35c5eded6f2a0dee84376d57189bda446887cc398bbe757ad
font_01_sfnt_off000166b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166B6 11232 bytes
SHA-256: 2476b86074d193bc45b2e975da2c3c616e68ed4561714a98e7bd77850fd2b3c8
font_02_sfnt_off000180b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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