Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6ed342a25bf3c9…

MALICIOUS

PDF

82.4 KB Created: 2021-02-11 09:24:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: a00cbaa020b9d521ac075a65505906fe SHA-1: 29840d9c4e4059740dd3353cc72861bfe714835e SHA-256: dc6ed342a25bf3c9a953b88b5adbec5c371b825fa5fadb1fdd71eb42f7e27a6f
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, disguised as a search result for a commercial product. Heuristics indicate this is a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/aws?utm_term=macys+bed+sheets+king PDF link annotation
    • https://sajijudid.weebly.com/uploads/1/3/5/3/135393685/6864438.pdfIn PDF document text
    • http://aycotoro0.xyz/snake_worm_offline_zone_io_apkd0s5y.pdfIn PDF document text
    • http://acgmgroup.ru/senozifojigejiuxlo8.pdfIn PDF document text
    • http://teleporttur.ru/retrograde_pyelogram_medical_definitionrvqsm.pdfIn PDF document text
    • http://demask.space/wodowomawakexws3g.pdfIn PDF document text
    • http://zokixofevuku.22web.org/71799747127.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zodawanuror/audio_editor_cut_merge_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/63593179675.pdfIn PDF document text
    • http://sexikiti.epizy.com/brother_printer_utilities.pdfIn PDF document text
    • http://miripiwamaza.epizy.com/bosufapipotaxum.pdfIn PDF document text
    • http://gotutopaxedirek.epizy.com/dobeteralitetivarokeki.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/66435808446.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/lutudola.pdfIn PDF document text
    • http://taxisariwoboduz.epizy.com/bevifosulimaxobade.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/formulir_klaim_asuransi_kesehatan_axa_mandiri.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/dopizogu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF876 5064 bytes
SHA-256: f9297412c97354fc5e04b987b1ddc53680a10ad7430a8a44426bf958fa4b4ab0
font_01_sfnt_off000109ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AB 10848 bytes
SHA-256: 9608ffe71f842c68dae656f99eab9b4bf6d89ad642bda63e9351d34e10b1f6ed
font_02_sfnt_off00012e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E77 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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