Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a27aa145ed5c43…

MALICIOUS

PDF

74.6 KB Created: 2021-04-06 22:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cdecb2c8f226b229633c0faf05b1b2dc SHA-1: b6c9d6ea5f9fe61152ec7954d7cabab2d6d10e03 SHA-256: e2a27aa145ed5c439e780b1808fbfe7d22fd505e08fa516c742d299a290a1c85
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it is part of a link farm or SEO manipulation scheme. The ClamAV detection and ML classifier also indicate malicious intent, likely related to phishing or distributing malware. The embedded URLs point to various domains, some of which are suspicious, and are likely used to redirect users to malicious sites or download further payloads.

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 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://jottigo.ru/award?keyword=beyond+compare+3+pdf+diff PDF link annotation
    • https://cdn.sqhk.co/nigetele/lax8heb/medevugapewowamuzuza.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/lm358_op_amp_datasheetkj4a2.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxonavi/ibmegd0/netflix_party_chrome_extension_not_showing_up.pdfIn PDF document text
    • http://shortsomfj.space/zovitowegavafamovigireb9gwo.pdfIn PDF document text
    • https://cdn.sqhk.co/maxegugej/Pg0hdJv/86780649677.pdfIn PDF document text
    • https://xinomufe.weebly.com/uploads/1/3/4/7/134706409/9499371.pdfIn PDF document text
    • https://gigerexug.weebly.com/uploads/1/3/5/3/135341911/noninuwabedupubaxagu.pdfIn PDF document text
    • https://sezebotari.weebly.com/uploads/1/3/1/6/131636698/dezewe.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/TBXjejd/37958457985.pdfIn PDF document text
    • http://sunny-web.ru/les_dijeron_a_los_estudiantes_que_no_a_copiar_en_los_exmenesz5uxi.pdfIn PDF document text
    • http://totalcreditreport.info/nivemusorugameruvuxuwovomqhhc5.pdfIn PDF document text
    • https://cdn.sqhk.co/mogidamiko/hhihhCr/56227721559.pdfIn PDF document text
    • https://cdn.sqhk.co/somepizeko/QCYKNgi/tebiw.pdfIn PDF document text
    • https://raziliselew.weebly.com/uploads/1/3/2/6/132695443/1944445.pdfIn PDF document text
    • https://fikejibin.weebly.com/uploads/1/3/4/3/134331262/wimubesituza.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/xamapebonijos/jebajuxerenawamuzuvixome.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/impaired_fasting_glucose_diet_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/nofunamojowikebiman.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/95345689987.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/78594546280.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/avengers_endgame_theme_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/fodebapimukeku.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_off0000e7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DA 5404 bytes
SHA-256: 4a528bf3d2df33949d859990e479d38741906d8791e28493752cc97c969403ef
font_01_sfnt_off0000fa37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA37 10544 bytes
SHA-256: 17b098001943032f84ea6cab4ee1c59a9b912fd8711bc064e5912aacf813de95

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