Malicious PDF — malware analysis report

Static analysis result for SHA-256 741e4639aa38af26…

MALICIOUS

PDF

74.1 KB Created: 2021-02-15 20:40:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: e9349d099e54547f8d13f22135e6ef85 SHA-1: 43dbd61560ba153b9efa69cd2ec33dcaea396394 SHA-256: 741e4639aa38af26c74e898b7fe9bcdc272cf3261e2f842b42f49e03cdc190ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, a common tactic for SEO link farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. The embedded URLs, such as 'https://leonvi.ru/wix?keyword=multiple+means+of+representation+engagement+and+expression', suggest the document is designed to drive traffic to potentially malicious websites.

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 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.
  • 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/wix?keyword=multiple+means+of+representation+engagement+and+expression PDF link annotation
    • https://cdn.sqhk.co/wubofuse/KgghjpM/optical_illusion_carpet_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/xugosovemi/jjbgggj/cheat_thrill_rush_theme_park_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/detazido/hNfgiwl/my_singing_monsters_hack_app_download_ios.pdfIn PDF document text
    • https://nasesugafod.weebly.com/uploads/1/3/5/3/135387958/dovafumesemu.pdfIn PDF document text
    • http://uspeh.icu/dangerous_beauty_parents_guidexpcna.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/do6QZ6Z/friday_the_13th_killer_name.pdfIn PDF document text
    • https://cdn.sqhk.co/dazibewibu/3ZPW8ox/kirusagadedebifem.pdfIn PDF document text
    • https://ridogorizaloliv.weebly.com/uploads/1/3/4/5/134527302/tuxejapukoli_mujoz.pdfIn PDF document text
    • https://cdn.sqhk.co/goduwonon/jbbWgjY/46434698751.pdfIn PDF document text
    • https://vejazisiji.weebly.com/uploads/1/3/0/9/130969480/dufosinaso_jafirum_pipulamogake_luvikovubufor.pdfIn PDF document text
    • http://mifvideo.space/paint._net_text_formations_plugin6cgcc.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/dihij1A/top_40_pop_songs_march_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/nokemaxun.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/59607997157.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/83992153915.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/amparo_directo_en_materia_administrativa_formato.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/wrong_icon_vector_free.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_off0000e58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58C 5436 bytes
SHA-256: 34285a04b0f8b7b5d91476ce7993b48fdf0c1733fa0fbe0f0863e447a26bbb01
font_01_sfnt_off0000f800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF800 10240 bytes
SHA-256: 8447103c0884b9fd7b77236b02793789604de72e68fa5b0f01b5253be6224fab

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