Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe2b08dd331e966…

MALICIOUS

PDF

72.9 KB Created: 2021-03-01 05:12:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 65df33568959046dfd18fb3824839c12 SHA-1: ee1b374b84b29d676bf0966032ae88ffbd53767f SHA-256: bbe2b08dd331e966a72919bf27a66274db85682bc76f8b280ab63919fa240418
126 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous embedded URLs pointing to disposable hosting, suggesting an attempt to redirect users to malicious sites or download further payloads. The presence of external URIs and the link farm heuristic strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/wix?keyword=gunship+battle+apk+hack PDF link annotation
    • https://cdn.sqhk.co/votojuxosaf/ibhiZhh/wumodalenofajisefonaj.pdfIn PDF document text
    • http://ourfutures.space/wazatodowaloritevibrv28r.pdfIn PDF document text
    • https://cdn.sqhk.co/pakiwujipubi/hYjjcLM/8352750807.pdfIn PDF document text
    • http://amaryllis.space/baishe_srabon_movie_linknrlol.pdfIn PDF document text
    • https://baboxubawuxi.weebly.com/uploads/1/3/4/6/134666135/wibapefajuketes_konejojisuj_zovusa.pdfIn PDF document text
    • http://hdsamara.ru/logo_quiz_answers_level_77mc54w.pdfIn PDF document text
    • http://defumemijiwof.22web.org/fakari.pdfIn PDF document text
    • http://honbiz.pro/81181431716vpupm.pdfIn PDF document text
    • http://get3creditscores.info/74805492788ueg4a.pdfIn PDF document text
    • https://cdn.sqhk.co/dojidavos/EjjjhTa/kujisugenoketewimufidazad.pdfIn PDF document text
    • http://help-feedback-amzn3.xyz/32102322829zgupq.pdfIn PDF document text
    • http://50offshop.pro/exercicios_bissetriz_de_um_angulo_70og9s.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/fiturigat4lsgo.pdfIn PDF document text
    • http://abistrans.ru/scientific_notation_worksheet_chemistry_answers2fz0k.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e1dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DD 5160 bytes
SHA-256: 8c7bbc3953d4e39528a53c686651e1e22c3d24bc2743a2bf8d72cd028e2b5c1f
font_01_sfnt_off0000f369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF369 10408 bytes
SHA-256: aeb88bc52834c81038f4360381aec41ed38aff51e766f2e23d0da8754edc2c31

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