Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d0289ea6ef64f2…

MALICIOUS

PDF

80.2 KB Created: 2021-03-17 18:50:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 99f1a9804a7ed5c7c40243030f457f0e SHA-1: 4bfa1cd077f3802fb31b3687934a1c8f99c1e16c SHA-256: 07d0289ea6ef64f2316601f2e2de8845bc3122c709615dcf706abeb0df395c75
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 0.9998

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://jumiwimov.ru/award?keyword=determination+of+calorific+value+of+fuel+pdf PDF link annotation
    • https://nokibuvekunel.weebly.com/uploads/1/3/1/1/131164430/7972784.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/jiOibhg/13565120251.pdfIn PDF document text
    • http://pawelemofub.iblogger.org/stephen_hawking_final_book_amazon.pdfIn PDF document text
    • https://bejobofilu.weebly.com/uploads/1/3/0/8/130814531/eae0d4eabde.pdfIn PDF document text
    • https://cdn.sqhk.co/joninopi/yhiicw6/83167193286.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/tibupigofakafup.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/gh4FYha/ruvuralizatej.pdfIn PDF document text
    • https://sunejojixin.weebly.com/uploads/1/3/1/0/131071277/2768712.pdfIn PDF document text
    • https://pulijapejupexeb.weebly.com/uploads/1/3/4/0/134041872/5582800.pdfIn PDF document text
    • https://cdn.sqhk.co/sekigozujeme/yjagegc/25798596201.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/3fkNZ1Y/51186905545.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/Hb2VhcX/how_to_change_my_voicemail_number_on_iphone.pdfIn PDF document text
    • https://vugifalufaduzo.weebly.com/uploads/1/3/4/8/134889855/8037568.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tikolikenugim.epizy.com/zenadoduvejam.pdfIn PDF document text
    • http://jowunimigafej.rf.gd/5374656294.pdfIn PDF document text
    • http://zoketuru.epizy.com/71790830918.pdfIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_ab12986702f34a7caf95105dfd0b443a.pdf?index=trueIn PDF document text
    • https://bdf1a075-95da-4d9c-a64e-c4f1d9865a87.filesusr.com/ugd/bcd086_ef9b3bdabeb54c5cbd0a487aa2ab9150.pdf?index=trueIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_add45f9357924d8b8637752cb6265166.pdf?index=trueIn PDF document text
    • https://746420f6-3007-491b-ba72-fd43be5094e5.filesusr.com/ugd/277b62_c73d22bdb4fa41c28a2d2de3b7915c9e.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_off0000fa7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7C 5180 bytes
SHA-256: 5272879e465cb7fd53747abd1c48013400f878df143549f668e9b50022a270c4
font_01_sfnt_off00010c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C15 11676 bytes
SHA-256: afc70a7998ca99886e6e411cad1bbd2b6a34240a25d793907a79b34bc580dc38

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