Malicious PDF — malware analysis report

Static analysis result for SHA-256 406d7a49a7071b8e…

MALICIOUS

PDF

76.2 KB Created: 2021-03-18 07:16:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5fa7b395ac80405222ab36f679431a86 SHA-1: 1e55fce8eb2cb0f1f7698c501fc81158fe6421c0 SHA-256: 406d7a49a7071b8e5e9ab528b2a5a2bffe88c56ffd9781fc72fb9a2d66162c2e
126 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including ML and ClamAV, as malicious and a potential phishing or trojan delivery mechanism. It contains numerous embedded URLs pointing to disposable domains, characteristic of link farms used to distribute malware or conduct phishing campaigns. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/wix?keyword=the+royal+game+of+ur+buy PDF link annotation
    • http://serviceforyou.site/bhulekh_odisha_software_freeppwls.pdfIn PDF document text
    • http://siteznakomstv69.space/bhagat_singh_song_ringtone_freezzb5e.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/ijJZyF4/vejolitoxoxabuxexemunovo.pdfIn PDF document text
    • http://tekplafond.xyz/5091152279482xju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490367/normal_5ff1e96196e0a.pdfIn PDF document text
    • http://stepka2016.xyz/39821635316oq93k.pdfIn PDF document text
    • http://trydouche.xyz/which_is_the_best_polaroid_instant_camera_to_buyv11si.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/eeujd3T/pifopowejibajenevomibi.pdfIn PDF document text
    • https://cdn.sqhk.co/jivaduzar/UXjhS9C/anyone_else_but_you_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/perokokamosa/b9kjgif/45662924622.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_5fe6162f04319.pdfIn PDF document text
    • https://cdn.sqhk.co/jufenakajo/MgidU8Q/english_to_bangla_vocabulary_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392193/normal_60062ad2ef518.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3f46bf15-0a8c-4e80-b3e5-a2e3bf90e008.filesusr.com/ugd/8e6e76_b5fb5be5b0524e52a79c2f0c7e72e6b8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/responsive_web_design_template.pdfIn PDF document text
    • http://lirurija.rf.gd/vornado_humidifier_stopped_working.pdfIn PDF document text
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_eef4f5e968c94d5895425ab1babbe472.pdf?index=trueIn PDF document text
    • http://besuwodusibix.rf.gd/42101278506.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/bjcp_style_guidelines_pilsner.pdfIn PDF document text
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_5577f79f20e9414086d1b8559f19a663.pdf?index=trueIn PDF document text
    • http://jitoritobo.epizy.com/vapagiramopuru.pdfIn PDF document text
    • https://1dda4824-043e-406b-9213-03d4b91bb4d1.filesusr.com/ugd/7695bb_4e4bac39d5a7498c956702bcbf2cd5a7.pdf?index=trueIn 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_off0000ecaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAF 5192 bytes
SHA-256: 1de08e009af417e381bcce49411800d6a49051379df4fe007106f4d5e6655258
font_01_sfnt_off0000fe3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3D 10924 bytes
SHA-256: c4734a35587b783e47223700b928b5b8bdf321df02b027d6baee5b94281b2a8e

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