Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4be082db9425047…

MALICIOUS

PDF

73.8 KB Created: 2021-02-27 06:57:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: fd8b036394b45c56f0770dbb5a9f0341 SHA-1: 2867885d99c293e14d1e5696c6a4ee63a3b5576a SHA-256: a4be082db94250474893048fc6fee3c89b20c023093a061d7997cb4922caf740
126 Risk Score

Malware Insights

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

The PDF contains numerous external URLs, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, contains references to 'in the mood lyrics' and application metadata, suggesting a lure to external content. The presence of embedded URLs and the link farm heuristic strongly indicate a phishing or scam attempt to redirect users to malicious sites.

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://pelibifir.ru/aws?utm_term=in+the+mood+lyrics PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459792/normal_6030f9ef0aacc.pdfIn PDF document text
    • https://cdn.sqhk.co/xufaribo/4gdgihh/buxigutafewonedix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407299/normal_602a8bcc526c1.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/price_of_casio_edifice_chronograph_wr100m.pdfIn PDF document text
    • http://finejubopitugov.22web.org/17939097301.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/does_tomtom_charge_for_map_updates.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476578/normal_5ff2049d1d5f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480173/normal_5fefc9e6e2a1e.pdfIn PDF document text
    • https://cdn.sqhk.co/ronelejibir/h8ibihA/pibag.pdfIn PDF document text
    • https://jozugirizozixus.weebly.com/uploads/1/3/2/3/132303278/jedelivadoze.pdfIn PDF document text
    • https://pijaremurepapo.weebly.com/uploads/1/3/1/4/131406688/nosurenutu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nopugorib.onlinewebshop.net/bizegigig.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/23450509165.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_off0000e37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37E 5008 bytes
SHA-256: 1ab926b25cda4d5c9b74db6a59631b47bed721a2fe2a6a40c24ed6fee22f9c46
font_01_sfnt_off0000f463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF463 11460 bytes
SHA-256: 03d77e95b0b4c5d2ea481563aee2a99bfe7c6b28f2366e56cf47dc711280cf4d

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