Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e7560944aaf10a3…

MALICIOUS

PDF

74.8 KB Created: 2021-01-22 06:48:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5a2b547b99289b840afc01a593058954 SHA-1: 940387e99747aa91c414e57c3ca5027ae0e16e3b SHA-256: 3e7560944aaf10a3307e9ec69d271378697b7e08325b71d479e94b857b666b38
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on Weebly and other platforms, suggesting a link farm or SEO manipulation tactic. ClamAV detection and ML classification indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly support this attack pattern.

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://traffking.ru/123?utm_term=total+war+warhammer+2+cuboid+of+the+old+ones PDF link annotation
    • https://ginupegoforijef.weebly.com/uploads/1/3/4/7/134760486/612661.pdfIn PDF document text
    • https://pigebatidi.weebly.com/uploads/1/3/1/4/131482999/satapokaz.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/hcgjifZ/sutijeduba.pdfIn PDF document text
    • https://cdn.sqhk.co/patemugimej/eyFiGhh/earn_to_die_unblocked_weebly.pdfIn PDF document text
    • https://cdn.sqhk.co/tinupolureg/ijdhb0J/xafixuxonavinipegesufa.pdfIn PDF document text
    • https://cdn.sqhk.co/jiledexuda/1YWNigV/69456140843.pdfIn PDF document text
    • https://cdn.sqhk.co/dofewijoras/QghifWF/xukirimobazupenivama.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/Jvohdtr/tumblr_girl_drawing_black_and_white.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/WFIhchc/16519297363.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/lofese/78376206311.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/16250847.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/odia_bhajan_song_all.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/asoftech_photo_recovery_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/brown_bear_brown_bear_coloring_pages.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/rigegavajuxatunariw.pdfIn PDF document text
    • http://tugupora.epizy.com/42344936228.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/reropogebamisorojugubo.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_off0000e6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D1 5576 bytes
SHA-256: f4b697adbe98c889ee1efe1ac43a01638f1adc582ebf2b28fff9c00711578d76
font_01_sfnt_off0000f9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AA 10564 bytes
SHA-256: cd4f7f5ecec7bdfa11c8fd77ff7c0a5a4213e0e9cb3e7f1b4214ed4f32f4dc61

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