Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c44d7a2a29c3a26…

MALICIOUS

PDF

84.3 KB Created: 2021-03-02 00:12:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d5abe9094a7f37d93de434a94756ba97 SHA-1: 3a441d9747b838ec525b02df734b7e9a71d57cae SHA-256: 2c44d7a2a29c3a263ad3fb2b2a3e5fde76a1d6bd36bd8801955b7d80af3e448e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and the overall structure point towards a spearphishing attachment designed to redirect users to malicious content.

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 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://mezovuduw.ru/strik?utm_term=like+water+for+chocolate+summary+chapter+6 PDF link annotation
    • https://tixuguzuw.weebly.com/uploads/1/3/4/0/134096155/tebuxozeduvonurobu.pdfIn PDF document text
    • https://cdn.sqhk.co/rewaloxuruvu/1hdjbko/vazezubuzigowa.pdfIn PDF document text
    • https://sekorora.weebly.com/uploads/1/3/4/8/134856449/xurimakotimitudejuwo.pdfIn PDF document text
    • http://beremoter.online/redasosssr8.pdfIn PDF document text
    • http://vozivovog.scienceontheweb.net/vedic_maths_tricks_download.pdfIn PDF document text
    • http://damvglaz2.xyz/aura_o_las_violetas_libro_completouhvez.pdfIn PDF document text
    • https://kakowafalajoji.weebly.com/uploads/1/3/4/4/134455686/zukitodagegitejit.pdfIn PDF document text
    • https://vesabigixovo.weebly.com/uploads/1/3/1/8/131857304/3631601.pdfIn PDF document text
    • http://bofitek.iblogger.org/28743807934.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/aMjd1ig/pencil_sketch_drawing_artist.pdfIn PDF document text
    • http://gopidap.scienceontheweb.net/samsung_galaxy_s9_charger_port_replacement.pdfIn PDF document text
    • http://igcopyrightverify.com/jr_graphic_design_jobs_los_angeles5knm8.pdfIn PDF document text
    • http://topuniversityru.fun/8771680731tzx97.pdfIn PDF document text
    • https://dubobovutorikug.weebly.com/uploads/1/3/5/3/135332124/d3e6b50eb63f3fa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sulasusiramoti.epizy.com/90127078864.pdfIn PDF document text
    • http://wowutuzineko.myartsonline.com/change_12_m2_into_cm2.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_off00010ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC6 5608 bytes
SHA-256: 32b46f4be0a8cbec317f4143f92d234e709a3f606782122f9c779e185379cfb8
font_01_sfnt_off00011dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD4 11132 bytes
SHA-256: 8496d6862f2dd26930c1edad018d047f7131b4d8816f64604ce0aef097fc52c9

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