Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab5b7cb30a6eedf…

MALICIOUS

PDF

63.4 KB Created: 2021-01-26 01:56:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: fe8f6c81c7dd5e50e200ef190a5ec9dd SHA-1: b558ced381bd29bc4a9f4a25da3be29251f55592 SHA-256: 9ab5b7cb30a6eedfb3d09f232f4d5cfbaa2526c5c9b45b679fdcaa4829433ba2
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to 'trafffi.ru' and containing a 'one piece skeleton pajamas' query parameter, suggesting a lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or downloader attack.

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 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://trafffi.ru/123?utm_term=one+piece+skeleton+pajamas PDF link annotation
    • https://cdn.sqhk.co/feletitami/B2jjigF/23932759613.pdfIn PDF document text
    • https://bixarina.weebly.com/uploads/1/3/1/0/131069915/4da6919ba196ff.pdfIn PDF document text
    • https://vifazadaza.weebly.com/uploads/1/3/4/8/134883600/cf0db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460966/normal_5fdaaba89f747.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/dhwdmha/rugby_nations_19_gameplay.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423750/normal_5fd67cdce9042.pdfIn PDF document text
    • https://duzareledibasa.weebly.com/uploads/1/3/4/8/134890493/5828268.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369164/normal_5ffb201984dd9.pdfIn PDF document text
    • https://fowajenen.weebly.com/uploads/1/3/5/3/135329448/78e35e3.pdfIn PDF document text
    • http://digozulujatozuj.iblogger.org/aftron_tv_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/safimowexaw/ia8gjjf/buy_battlefield_4_commander_android.pdfIn PDF document text
    • http://vivoxasoro.22web.org/dujerejan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuzariwa.rf.gd/cereales_lion_informacion_nutricional.pdfIn PDF document text
    • http://kobizesamow.rf.gd/free_blumberg_forms_online.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_off0000bb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB3C 5152 bytes
SHA-256: 385880ed2942d2139dc4b9dc7aff78501da043eec6f3b942ef977f1b88eeab28
font_01_sfnt_off0000ccb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB7 10548 bytes
SHA-256: 5fbda296eef9f2c55d8480d5069899f1280a0366d32c357a1b639e71255e1977

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