Malicious PDF — malware analysis report

Static analysis result for SHA-256 9194c615a4bdc559…

MALICIOUS

PDF

102.4 KB Created: 2021-04-24 04:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5d0fab8bf5ae617b5f351d403830ce86 SHA-1: 29f6847f4d644858d7f614b655e9df404d3945d8 SHA-256: 9194c615a4bdc559b3f02cbdf9da7fca00c07f83f2875e0aa66f5123ccc0c309
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9987

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://crophysi.ru/strik?utm_term=logitech+harmony+hub+remote+only PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421354/normal_5feb4e91750e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403410/normal_5fe2759c9fa9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481166/normal_5fee10386441d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446494/normal_5fdbb44d07b49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446170/normal_6018bf4643a96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426687/normal_5fd62b88613a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_60248d7733749.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/jcihq16/25550326679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483623/normal_60190c88389dd.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/LhaXeji/celebrity_quiz_answers_level_91.pdfIn PDF document text
    • https://cdn.sqhk.co/losegiro/ejbhd2B/6506993799.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/iignMia/super_robot_car_transform_futuristic_supercar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377407/normal_602ee9bb60fb7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://569e8712-2873-4b93-a654-ea71b6b809e3.filesusr.com/ugd/345929_5770e209d8a54ffbb526a3416c767ac7.pdf?index=trueIn PDF document text
    • https://2e5cbe44-7de3-4e3f-b94c-8a8567814465.filesusr.com/ugd/f96b02_aa07df65ce6c420fa791dd9ad6a10c58.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/netgear_gs108e_v2_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/65020528962.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/57065435201.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/sagovo.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/67177041110.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/english_film_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/pejovupeku.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000133a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A0 5100 bytes
SHA-256: e42fe2384da7af5c1614e3409762aca4518e9393bc48b55c46cc0a82c15cefd7
font_01_sfnt_off000144d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144D8 4028 bytes
SHA-256: 7a902d574be753cfae847a91af67a8da2f3fb4a608e3c2b9c96add46bc48f693
font_02_sfnt_off00015473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15473 11944 bytes
SHA-256: ce997e26df978da782647d128b2dc8dfcd3e3f73f3a931699936e1c103566b19
font_03_sfnt_off00017d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D26 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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