Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7b25533d73485ce…

MALICIOUS

PDF

79.6 KB Created: 2021-02-22 00:58:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ede1a8b46bcd49ff67a47c29cf4d85d6 SHA-1: 0e0dd0e0ae0aaa28d7b610308753b46ae8509d84 SHA-256: e7b25533d73485ce4dc736244010a4ce49209be602f66e742a6fb75dba1e74d8
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The primary URL, 'https://jottigo.ru/strik?utm_term=what+does+rattlesnake+flag+mean', indicates a lure based on a search query. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution via these links.

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://jottigo.ru/strik?utm_term=what+does+rattlesnake+flag+mean PDF link annotation
    • https://wabupakiwe.weebly.com/uploads/1/3/6/0/136057256/tevamubebuv-julorizudedirar.pdfIn PDF document text
    • https://cdn.sqhk.co/noradinez/cr6yifu/jelixakitanigovolumol.pdfIn PDF document text
    • http://creampiepow.club/multiplication_worksheets_grade_1cguhl.pdfIn PDF document text
    • http://itmax.info/bobby_deol_movie_badal39hoc.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/jkjiXih/36663886697.pdfIn PDF document text
    • http://sedouche.xyz/wosapuvu3azsv.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/b6BqghM/final_fantasy_7_remake_ps5.pdfIn PDF document text
    • http://mybestchan.online/topographic_map_skills_practice_sheet_answer_keyono5p.pdfIn PDF document text
    • https://cdn.sqhk.co/pometobab/gU3ie4c/viking_village_seafood_nj.pdfIn PDF document text
    • http://max-lifting.store/wodegosozbzm8b.pdfIn PDF document text
    • https://kiloxuloje.weebly.com/uploads/1/3/5/3/135398856/likomilumomej.pdfIn PDF document text
    • https://paweweribawu.weebly.com/uploads/1/3/4/6/134656346/5624667.pdfIn PDF document text
    • https://sagetiruguw.weebly.com/uploads/1/3/0/8/130814856/bceea3fb.pdfIn PDF document text
    • https://cdn.sqhk.co/nudogada/hbXVNia/pacify_synonyms_definition.pdfIn PDF document text
    • http://znatural.space/nintendo_3ds_emulator_apk_aptoideaccpk.pdfIn PDF document text
    • https://zufodivovogopot.weebly.com/uploads/1/3/1/3/131383523/wajemelekikiv_tirop.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/pesetufavo/38121721968.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/52188760182.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/attitude_shayari_dp.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/league_of_legends_kai_sa_guide.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF905 5400 bytes
SHA-256: e62ba13393b55523603ba3928f0961634021c2868fab032b5d7b4ef8579122ff
font_01_sfnt_off00010b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B41 10868 bytes
SHA-256: 82ea6e8be7c3c53a74dac6d98053e4fe6836925cedcc9167f8c393953230b570

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