Malicious PDF — malware analysis report

Static analysis result for SHA-256 00b0fc7d5b768bec…

MALICIOUS

PDF

75.0 KB Created: 2021-02-09 22:26:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d7301dbb22f01537b0c2f70d009a8399 SHA-1: 9bfc130557c8db1169be1807571ad79034b9793f SHA-256: 00b0fc7d5b768becd1e200a3548a4865b6dd22ac2f35722daa28df4050718906
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the phishing lure attack pattern.

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://bologen.ru/wb?keyword=alfa%20romeo%20giulia%20quadrifoglio%20manual%20for%20sale PDF link annotation
    • http://pmaider.com/9895941323bnhew.pdfIn PDF document text
    • http://ketousa.site/solifomexmfe9p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450502/normal_5fc5be9ee130c.pdfIn PDF document text
    • http://dkblogin-de.best/godiwasukujudevilibiwod6d8r.pdfIn PDF document text
    • http://vivadoctor.ru/spanish_composition_through_literatus5y7r.pdfIn PDF document text
    • http://cashfree.store/55131059278tnfac.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/bgejdgj/tower_defense_king_hack_android.pdfIn PDF document text
    • http://adyga.site/venuwamaxediliwagn2955.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402503/normal_60223567522f2.pdfIn PDF document text
    • https://cdn.sqhk.co/zumufapofow/do8Uhfz/fimamazukisex.pdfIn PDF document text
    • https://cdn.sqhk.co/rujuwawuju/ijLIygh/mopeniwuwenigaziv.pdfIn PDF document text
    • http://sun-italy.space/bacterial_infection_disease_treatment_during_pregnancyyyqmd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pupovedifa.rf.gd/wedijakabejixajem.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/88345388464.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_off0000e54c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54C 5340 bytes
SHA-256: 47151de49a9b16b102a596a8aad87c154f58783c4eb2ec8c287b4647f18d9755
font_01_sfnt_off0000f757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF757 11080 bytes
SHA-256: cea522799e524bb7d31ec963f86465359605a11b7e495b0d23c397754a56135d

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