Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2b204f587142f1…

MALICIOUS

PDF

82.2 KB Created: 2021-03-15 21:58:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f86c68075ab29d52bcf2e5fe87882b4 SHA-1: 757ee92d69786c184a9eaf1823d3ff8383e9a5c0 SHA-256: bd2b204f587142f16c44824438d259c2d932f3dddf8668d841ff1e1e601ce484
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/award?keyword=dictionary+oxford+pdf+download
    • https://wudizabilizone.weebly.com/uploads/1/3/4/7/134745746/zeresi.pdf
    • http://reduslimitaly-official.site/55027802162s61kb.pdf
    • http://bisolivagamego.22web.org/tamilgun_bahubali_2_tamil_movie.pdf
    • https://kosazuritejozu.weebly.com/uploads/1/3/0/8/130874521/kaxawanugigugadivow.pdf
    • http://odemebayisitrafik.com/blog_page_template_freenqr9n.pdf
    • https://bupedokan.weebly.com/uploads/1/3/1/6/131607930/tukikow.pdf
    • https://cdn.sqhk.co/wuvakumo/gixUPhd/bloons_td_battles.pdf
    • http://jobware.pro/kijomasowutiropo5xvms.pdf
    • https://cdn.sqhk.co/dodirijobadi/hRkriaH/64663012742.pdf
    • https://cdn.sqhk.co/fowipovoji/ibiaia5/97041492519.pdf
    • https://cdn.sqhk.co/kazaluxi/hj9kk8g/23098067555.pdf
    • https://xixemoxutosiseg.weebly.com/uploads/1/3/4/4/134473276/4795766.pdf
    • http://nout-prodat.site/44526490689tjx43.pdf
    • https://cdn.sqhk.co/lexebogefaj/jiagicg/ball_blast_app_hack.pdf
    • https://cdn.sqhk.co/kasapisu/qcyFjcn/driver_vehicle_inspection_report_template.pdf
    • http://jixelaxoli.66ghz.com/82185146932.pdf
    • https://kufidadifijerid.weebly.com/uploads/1/3/1/4/131407945/6580600.pdf
    • https://cdn.sqhk.co/kezavilageg/idyhjja/jugar_standoff_multiplayer_en_pc.pdf
    • https://cdn.sqhk.co/juvanejejuwo/aYHl95V/islanders_game_6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rabopusafat.epizy.com/48259784040.pdf
    • https://s3.amazonaws.com/daxemo/john_deere_345_mower_deck_removal.pdf
    • https://s3.amazonaws.com/tugafebip/best_way_to_learn_how_to_program_plcs.pdf
    • http://lowakeze.rf.gd/carly_bmw_android_wifi.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_off000104df.bin
9121a67fea08599fecc4987a8d6acb0315cd901ea208c1199ebbf85867a58dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104DF 5232 bytes
font_01_sfnt_off000116e3.bin
e499552bf93509eae31e7ca88b9cf0c6343cb366083d1d7781d1ae47f47cd6a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116E3 10656 bytes

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