Malicious PDF — malware analysis report

Static analysis result for SHA-256 e985338b6899bae2…

MALICIOUS

PDF

74.6 KB Created: 2021-03-19 00:13:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6d4bf047c9bcd0d5b91b01c82ffe278b SHA-1: ea4d4b3cd5cff754d0951ca502bb55fc8f35b743 SHA-256: e985338b6899bae2d00ba9d71ec7a5513a38b442efff6bac64f646fe57a56f3b
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://xezojetit.ru/wix?keyword=mercury+marine+verado+owners+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455374/normal_602f63b475e76.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451047/normal_5fde9ed4a298a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481155/normal_5fc609978a54c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487625/normal_5fe5e4da6a182.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490934/normal_6000a4cfdc821.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405194/normal_603eb378639e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459174/normal_5fd6a13d5b613.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386334/normal_5fe3bce8d9223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413110/normal_600e5e174dc69.pdfIn PDF document text
    • http://tefukuk.iblogger.org/77502873037.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/fafbbc25-fa73-46de-a5d9-00c492784117/84583330226.pdfIn PDF document text
    • http://wesufonezis.epizy.com/badsha_the_don_full_movie_filmywap.pdfIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_18e9cc202859442a9e4fefc9a0c9017a.pdf?index=trueIn PDF document text
    • https://f4b9ed98-44c1-44e6-9966-d9817cd43de7.filesusr.com/ugd/9ced5d_88d09b38080e492593c71de6b6a22bcd.pdf?index=trueIn PDF document text
    • https://2dcb0092-dd22-4cef-90c1-8c398f802bb7.filesusr.com/ugd/ff3115_a415a272875b4e678c6be95ce5b36805.pdf?index=trueIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_99aefc7280364bd0818c30db79f8995c.pdf?index=trueIn PDF document text
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_29fa8f3561b346eeb9031a4858321818.pdf?index=trueIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_902f5e9ffab442658529eee0e205bd13.pdf?index=trueIn PDF document text
    • http://pixotet.epizy.com/70322358218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db0b33d8-0b06-4ccc-aa68-2ab071d956e8/91798303470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24e7a157-0ba0-43ed-9323-78dee8419f6e/pulufexitagiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9604d5d2-f82f-44b9-8151-e0a2b852d98e/what_does_the_tenth_mean_in_hebrew.pdfIn PDF document text
    • https://b54663a3-ff9d-4122-b75c-69b71428c9b0.filesusr.com/ugd/cfa91a_b0b0c06ab2c74582beb7893baccfa853.pdf?index=trueIn PDF document text
    • https://5b2b9875-3923-4577-9ef6-0527498c95e7.filesusr.com/ugd/4e6dd5_2ed9d96427b24372ad61d8358a3a809a.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_off0000e4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BE 5344 bytes
SHA-256: 4ccd9ea40e35c7b205af5e9102b6dd939dfcd97c2cf0b5f232f871be226cbe03
font_01_sfnt_off0000f6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F6 11484 bytes
SHA-256: a242a4f405ca67b06d76282a34abd7e736661c970bf8c936b9a7572e4d5a12d0