Malicious PDF — malware analysis report

Static analysis result for SHA-256 34359958c96d761a…

MALICIOUS

PDF

75.8 KB Created: 2021-04-07 21:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 673d4b55bc4a5912b1ddda01e6025bdc SHA-1: e097e93f1afcb40c6dd391abcfc80326290c79fc SHA-256: 34359958c96d761a9995fa9be3a68927dd56f9aaeae338ff917e4a52b79e9068
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of a large number of external links, many pointing to seemingly unrelated PDF documents, suggests a link farm or SEO poisoning attempt. While no scripts were explicitly extracted, the PDF structure and the nature of the heuristics indicate a malicious intent to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/aws?utm_term=epson+ex3220+projector+review
    • https://xajasirofoxuki.weebly.com/uploads/1/3/5/3/135330212/ximufesitegevosanito.pdf
    • http://wownatural.fun/60870297848epwz5.pdf
    • https://tutusilubejisev.weebly.com/uploads/1/3/4/5/134599447/f849e6225fb.pdf
    • http://palopepidek.mypressonline.com/design_and_analysis_of_algorithms_ebook_free_download.pdf
    • https://mafakovik.weebly.com/uploads/1/3/5/3/135347242/2610313.pdf
    • https://dugezuwodovapa.weebly.com/uploads/1/3/0/8/130874298/kamifulepuliru_saxux_kusosexulum.pdf
    • http://sodalabs.pro/hillsborough_county_last_day_of_school_2021c9ylc.pdf
    • http://rcasino.info/kumon_books_grade_3_australia2daye.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/negonanopix/shivprasad_koirala_.net_interview_questions_and_answers.pdf
    • https://s3.amazonaws.com/visagogijulep/heavy_bowgun_monster_hunter_world_guide.pdf
    • https://s3.amazonaws.com/tomaxade/lavepafuv.pdf
    • https://s3.amazonaws.com/dowesitobuga/sharp_double_grill_convection_microwave_oven_r-898c-s_manual.pdf
    • https://s3.amazonaws.com/zolerazowubow/pujobomuxarositapitijimed.pdf
    • https://s3.amazonaws.com/wupuxus/what_does_the_term_auld_lang_syne_mean.pdf
    • https://s3.amazonaws.com/jowutoneranemuk/gis_analyst_resume_templates.pdf
    • https://s3.amazonaws.com/zarelusipofox/boboiboy_galaxy_theme_song.pdf
    • https://s3.amazonaws.com/mokamoba/oscillator_mcq.pdf
    • http://vupaguriwedizid.atwebpages.com/political_theology_books.pdf
    • https://s3.amazonaws.com/zukogi/87899096237.pdf
    • https://s3.amazonaws.com/wesezuzuvalirik/68028221590.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7fa.bin
5536524bdbdbf51f5bf32cf290910a7a07907168daf3612b60a34a2b6769ce0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FA 5376 bytes
font_01_sfnt_off0000fa73.bin
58055d4a1b61165f3db92f092fe7f3045976841ec28563d648e36dc892cf400e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA73 11140 bytes

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