Malicious PDF — malware analysis report

Static analysis result for SHA-256 146adc8ae4d32127…

MALICIOUS

PDF

74.4 KB Created: 2021-03-18 22:48:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4c2dbfed1fcd6142865be4e5a657b18e SHA-1: 504fca4435cf469b30da9312be72f88c6795c2e2 SHA-256: 146adc8ae4d3212781182ddaaa9f422edbf4299989ba0b1e6deff2becbf1ad1e
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external URIs and is structured as a link farm, indicating a phishing or malware distribution attempt. The presence of embedded URLs suggests an attempt to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/award?keyword=aide+memoire+tuyauterie+industrielle+pdf PDF link annotation
    • http://pexanubaxomuzo.22web.org/wirodowokejiga.pdfIn PDF document text
    • http://idealica-itufficiale.website/uc_browser_for_windows_7_mobileina31.pdfIn PDF document text
    • http://erogan-columbia.site/visual_anatomy_and_physiology_martinid614t.pdfIn PDF document text
    • http://lastmarkt.ru/gesafepikixuzivaxelaxoxh15s.pdfIn PDF document text
    • https://malojedatev.weebly.com/uploads/1/3/0/8/130813840/gererum.pdfIn PDF document text
    • https://cdn.sqhk.co/bidekidarub/xjcjBid/muripufogaxo.pdfIn PDF document text
    • https://vonuvevija.weebly.com/uploads/1/3/1/4/131407152/bidogodarutewedafane.pdfIn PDF document text
    • https://cdn.sqhk.co/zinumazak/jdgghZm/game_table_top_racing_free_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/jZhhftI/zumobobujuvete.pdfIn PDF document text
    • https://cdn.sqhk.co/gesokusa/ggm4Igf/black_hole_live_wallpaper_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/dipewoduge/5hcgjIG/5825027496.pdfIn PDF document text
    • https://marajudalade.weebly.com/uploads/1/3/1/4/131438096/4805486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409250/normal_5fd9fbdcc3fee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383561/normal_5fd09344e4761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417314/normal_603d8426165cc.pdfIn PDF document text
    • https://wogefusupe.weebly.com/uploads/1/3/0/7/130740138/jupatepu_lajizenekajigo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_603a103102d8c.pdfIn PDF document text
    • http://qupieasy.online/barcarolle_sheet_music_freej1goh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wadedizori.epizy.com/didewo.pdfIn PDF document text
    • http://pixutuvaw.rf.gd/34940455126.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/fugebudezakitubeteponox.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/qualified_audit_report_examples.pdfIn PDF document text
    • http://judafigot.rf.gd/devoxirufasemajazo.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/facing_love_addiction_quotes.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_off0000e3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FD 5276 bytes
SHA-256: 39161836d9ce685d385bb430a6ab4594682325fef65c7d13359162df3048c1fe
font_01_sfnt_off0000f5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DD 11972 bytes
SHA-256: 71548507110e46db4bcd872b8fc342537d4f487d6fd5300e393682ada65b948b

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