Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb5a9df2a1abad2…

MALICIOUS

PDF

89.3 KB Created: 2021-04-02 00:20:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d61435c5533b8fa5ecf071b68374e80c SHA-1: 48a607062e2b2692d609092875fb9e301eea4826 SHA-256: acb5a9df2a1abad23a78e354d51bd82e1325d83138c46d44e7569a82d2fce032
156 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. The heuristic 'PDF_SEO_LINK_FARM' reveals the document contains a large number of external links, suggesting it's part of a link farm designed to distribute malicious content or phish users. One of the primary external links points to a URL that appears to be part of this scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://golowaki.ru/wix?keyword=nissan+50+forklift+operators+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421471/normal_5fd950a974e0a.pdfIn PDF document text
    • https://cdn.sqhk.co/ritasuxa/jAgdiix/ant_bait_lowes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_603fbaa16b16f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494430/normal_5ffd2c959bcb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413005/normal_600575cf9e03f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450242/normal_602012ab57c67.pdfIn PDF document text
    • https://cdn.sqhk.co/pawekenu/igja39Q/anime_girl_fashion_makeup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_603cc5e94427d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414848/normal_604aafc072269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464730/normal_6024efa5df639.pdfIn PDF document text
    • https://cdn.sqhk.co/vefomatakin/gosPjgW/futiwokuwobi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409614/normal_60275acf255c6.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/alAih1e/nutisoxaligoxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/mythic_character_sheet_pathfinder.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/fpurx_fund_fact_sheet.pdfIn PDF document text
    • https://04a80c79-134c-446e-801b-0c1635678e59.filesusr.com/ugd/5cebf8_719ce2dcb8184bc6a19919f53a82965b.pdf?index=trueIn PDF document text
    • https://9cc02d22-446e-415d-9686-6e49aadcb3b3.filesusr.com/ugd/aa6a08_097bf58702e0408facd3037c233ca150.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/guvovigo/doxaxelekagimuvik.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/terry_pratchett_books_where_to_start.pdfIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_d8ebb940b190483fb7c673102fff8088.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_off000121c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C7 5348 bytes
SHA-256: f6efecbd2a1e83c0c01abe31ed67c6fe817ddc7a1eb2328abbdbfb80fd729aa2
font_01_sfnt_off000133eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133EB 10456 bytes
SHA-256: 212d4acf71fb053f6610f9650f86b51371635016576adea5593c22aead1e0d00

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