Malicious PDF — malware analysis report

Static analysis result for SHA-256 236d0a5e1d195d7e…

MALICIOUS

PDF

80.2 KB Created: 2021-03-09 00:52:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 71da419db6dfd75feaf9dc9ccde902a5 SHA-1: 824165f065cff5aaba4825f6806818f3cfd1ad28 SHA-256: 236d0a5e1d195d7e65acbda8e0365fa95e1cb43cf9525e86f920ef63acd4fc2e
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to French visa attestations. The presence of numerous external links, many pointing to PDF files hosted on disposable domains, indicates a link farm designed to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/award?keyword=attestation+d+accueil+for+french+visa+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389387/normal_601e0d528ebe5.pdfIn PDF document text
    • http://shtancircul.site/97047469795cvk8w.pdfIn PDF document text
    • http://bathforlegs.xyz/how_to_calculate_total_distance_traveledxaiy7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481515/normal_5ff3a9093aac8.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/nudekufuxeju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391326/normal_603c5ec5b17da.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/Jjfhdjj/how_to_draw_descendants_3_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/hhohgqZ/line_runner_job.pdfIn PDF document text
    • http://businessoutsourcing.info/lalesuwusenapizuk3zsmo.pdfIn PDF document text
    • https://cdn.sqhk.co/noradinez/ugfgcgc/37234758457.pdfIn PDF document text
    • http://complect-tech.ru/al_ataque_mikhail_talng47l.pdfIn PDF document text
    • http://hellesypakk.online/marguerite_duras_livresjp5fk.pdfIn PDF document text
    • http://repair-kompov.ru/43667403959cmuaz.pdfIn PDF document text
    • http://raifaisentapp.online/the_namesake_jhumpa_lahiri62p90.pdfIn PDF document text
    • http://itali-big.space/disney_pixar_up_theme_piano_musescore55c86.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gukuwet.epizy.com/80734563233.pdfIn PDF document text
    • http://pozijawikubinun.myartsonline.com/42141681289.pdfIn PDF document text
    • http://minuwugonobusuw.epizy.com/automobile_technology_free.pdfIn PDF document text
    • http://miwufojo.epizy.com/zenuwobadalafofatilowodad.pdfIn PDF document text
    • http://nazonuretowu.epizy.com/kutarudorulofuwadakuruzes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE1 5172 bytes
SHA-256: 33e2467bc1dc421ca1cbcb2d65fbcb0cf1cbf3e60e3b687e0da90b86e4923957
font_01_sfnt_off00010173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10173 10424 bytes
SHA-256: 6130f5f55d54707b38ce445e282e2fb724773c4794b5edd768d500f2b5dd6703
font_02_sfnt_off0001250a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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