Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c46626dbdd2e83a…

MALICIOUS

PDF

72.5 KB Created: 2021-05-16 14:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 924f33f88ae091ed24930cd17bb5992d SHA-1: 0c2a3737fa23f85dbbc6b5eba0e9b83bc53a2144 SHA-256: 2c46626dbdd2e83a0306c142958fdda15ea7f51eeea915e561e86db5442f0653
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to obscure the true destination. One prominent URL, 'https://resalured.ru/strik?utm_term=black+and+decker+lids+off+jar+opener+manual', is presented in a way that could deceive users into believing it's related to a product manual, likely serving as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/strik?utm_term=black+and+decker+lids+off+jar+opener+manual PDF link annotation
    • https://waxevinibiwe.weebly.com/uploads/1/3/0/9/130969944/tozozavoraxuj_texagema.pdfIn PDF document text
    • https://wemizufatevovig.weebly.com/uploads/1/3/4/8/134896488/4268867.pdfIn PDF document text
    • https://gunimumatepatu.weebly.com/uploads/1/3/5/3/135313318/2094840.pdfIn PDF document text
    • https://vokuduvalabi.weebly.com/uploads/1/3/4/5/134502282/livatuxifije.pdfIn PDF document text
    • https://vapukukoson.weebly.com/uploads/1/3/0/7/130776878/9383534.pdfIn PDF document text
    • https://geredape.weebly.com/uploads/1/3/4/3/134349068/dupumasupiripunikata.pdfIn PDF document text
    • http://claire-irk.ru/cthulhu_britannicakiu1g.pdfIn PDF document text
    • https://lereviripos.weebly.com/uploads/1/3/4/6/134663640/kilazuritivezeva.pdfIn PDF document text
    • http://smartycredit.info/distinguish_between_essential_and_natural_boundary_conditionsaubrd.pdfIn PDF document text
    • https://tijisifexabid.weebly.com/uploads/1/3/1/0/131070771/bebeje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_91b7ab9fdf39413194d692eb011ea399.pdf?index=trueIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_ff5893b0e6374e5da7e91de78de84486.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2bc7ad6-3bcb-466b-9f82-85d850686a6c/how_to_find_a_stock_symbol.pdfIn PDF document text
    • https://438c9214-13ba-44a2-8469-a4c97ff43377.filesusr.com/ugd/5d46a0_64ba6b5f0fba4a88a2a9026807a82a7b.pdf?index=trueIn PDF document text
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_1c94fa1e33e44628a329fe6dfb758ace.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed31a8a8-dc7e-40ec-bb31-48fe912a028b/tenetoferarit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb36088c-2008-4089-8590-7aedc2b22a33/flowers_of_algernon_movie_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb7b099b-3ebe-4470-a951-763f695f2657/pereb.pdfIn PDF document text
    • https://b56e00ce-d729-42e9-814b-b9a4b194f5ba.filesusr.com/ugd/f6f93f_0d55144c86af4002a3427031a0db1589.pdf?index=trueIn PDF document text
    • https://0633afab-057d-4448-85e1-ac1a97571725.filesusr.com/ugd/66920c_8d53c5c2592a42fb9a21dfb98021a866.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC8 5488 bytes
SHA-256: 83da28b6a3bf6425f4a8641faa1ad41640e8cdcc2be3eaf185c937d72c7de261
font_01_sfnt_off0000ee6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6E 11256 bytes
SHA-256: 453ae143ed986c190e87d92618f2a70cd7ad223013cf4431e2181680e9753613