Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d293358a957bfb…

MALICIOUS

PDF

97.0 KB Created: 2021-04-01 20:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f369d43f63c268503293a5897d775875 SHA-1: f6010e498603243c23e516d726f3ea5136589d7f SHA-256: e9d293358a957bfbf2337632299eb071d2852366ea8d5e494086fe71f0f81f3b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or conduct phishing. The primary URL, 'https://bologen.ru/strik?utm_term=psalm+23+nkjv+bible+gateway', is presented as a Bible gateway link, a common lure for social engineering. No scripts were extracted, but the PDF structure and numerous external links indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/strik?utm_term=psalm+23+nkjv+bible+gateway PDF link annotation
    • https://wufonujixu.weebly.com/uploads/1/3/4/3/134386315/vipafamosim.pdfIn PDF document text
    • https://rituvusuxokit.weebly.com/uploads/1/3/5/3/135300238/b9810c890.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426688/normal_6026534d929b9.pdfIn PDF document text
    • https://jurisosisirebak.weebly.com/uploads/1/3/6/0/136086550/fd419080cb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460982/normal_60373338d3f00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382190/normal_5fc5f51bc2c61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407301/normal_6061141e73fbd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e98904a-018e-4115-8457-8304dd7e2ce7/40337713534.pdfIn PDF document text
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_d5d8af3d578a4f8ea57b2e8f24894212.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aabdae37-5e0d-4489-a718-19b5b0831bab/48494260350.pdfIn PDF document text
    • https://0816b8db-db6e-4af9-a106-1766ff0f8d73.filesusr.com/ugd/06e6c8_ad7c1954affc4a6bbe1677e56a1d8189.pdf?index=trueIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_24b31d5a5cf84f35a12dc7871a2ec315.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/how_to_draw_a_perspective.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15c05482-0148-487d-87ed-37c249321c72/wagiwixum.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/all_landforms_of_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e81b4b1d-7625-428a-ab8e-17d075709a56/fisher_price_rainforest_jumperoo_height_settings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd5fc505-bb32-4181-960f-6cf53b5c0800/which_lawn_mower_is_best_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afbeaac7-5aeb-4b3a-b55b-235b6fa286d7/bbc_english_grammar_book_class_6.pdfIn PDF document text
    • https://16b16ea1-1eac-4681-bfdb-39d0b7b0c60a.filesusr.com/ugd/d6b497_f6d24ae358ae42b1a8f66c16abdd867c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/05633966-ab4a-4c80-b0c8-a5e5c1576662/netgear_cg3000d_review.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/77769865354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bc7b793-c059-4ced-8edf-299acac83888/best_enzymatic_cleaner_for_pet_urine.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E3F 5740 bytes
SHA-256: bc0feacec1e132583d720ad643da71a48d6cae4dd344a573b8e8ebd271b8f30f
font_01_sfnt_off000141e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141E5 16532 bytes
SHA-256: 27337df3119ec9331e9b6e8cc983e19de650533c1dca57223139d72be32a11a3

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