Malicious PDF — malware analysis report

Static analysis result for SHA-256 c286bed42b57fdb4…

MALICIOUS

PDF

66.5 KB Created: 2021-02-12 11:54:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 030c7f5c33424e4eb06adcff841268ff SHA-1: d57857b5b8e8ca1712f66f69bdf797f26a2ab321 SHA-256: c286bed42b57fdb485fd7e218bcda3afd555b228aac7ec249e6810740106a740
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM' containing 30 external links. The primary URL, 'https://seumenha.ru/wix?keyword=what+words+start+with+r', suggests a potential SEO manipulation or phishing attempt. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', reinforcing its malicious nature.

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://seumenha.ru/wix?keyword=what+words+start+with+r PDF link annotation
    • https://cdn.sqhk.co/bapisolel/aichgid/poker_tournament_manager_app.pdfIn PDF document text
    • https://devojakosumu.weebly.com/uploads/1/3/5/3/135314674/nuxarojawugekox.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/gh6iegh/islands_in_the_stream_song_in_movies.pdfIn PDF document text
    • https://cdn.sqhk.co/karapazepot/GhfjiQi/68052206498.pdfIn PDF document text
    • https://cdn.sqhk.co/girasufu/bhgeif1/string_of_words.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/gdcii58/nature_sounds_birds_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/ijZtgf1/68603338170.pdfIn PDF document text
    • https://tiwibuvemugijaj.weebly.com/uploads/1/3/0/7/130776889/42bb1e938.pdfIn PDF document text
    • https://cdn.sqhk.co/mejofiwog/EYUiiih/guilty_crown_anime_trailer.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/kakef/fractions_to_decimals_printable_worksheets.pdfIn PDF document text
    • http://wetowudokik.epizy.com/alb_sport_v3_apk.pdfIn PDF document text
    • http://numebazo.rf.gd/cellulose_acetate_sheet_suppliers.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/bumblebee_toys_transformers_1.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/18885976990.pdfIn PDF document text
    • http://zirururifikelo.epizy.com/kabbalah_practica.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_off0000c6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D5 4988 bytes
SHA-256: fe4a89c46e8ce00eaab1d27798030ec6605af49a7b7a9cca380bf33531e11d31
font_01_sfnt_off0000d7d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D8 10452 bytes
SHA-256: b6a1f6184b351a1c56c4f0cd6c003c94a664c6555da8c12464b2c55b4cf2fc65

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