Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e2b03ce4190d48…

MALICIOUS

PDF

80.3 KB Created: 2021-03-03 05:36:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c18ce95026567305c74ad10a98f5d51b SHA-1: 521bd3f1978530b2c2423223e067dde1bed3f210 SHA-256: 84e2b03ce4190d4882f41681766ed5666c7d9d20e54b31517a9a27a06eab7275
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with a primary one pointing to 'baarspo.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links on disposable hosting, suggesting a phishing or spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites.

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://baarspo.ru/award?keyword=why+is+the+red+light+flickering+on+my+samsung+tv PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4495271/normal_60067b145a13b.pdfIn PDF document text
    • https://cdn.sqhk.co/nivavepe/jdBge3z/duzavibepomovajozifarofit.pdfIn PDF document text
    • http://detonic-ufficiale.website/la_vida_de_david_gale_peliculam61zs.pdfIn PDF document text
    • http://mishabelle.ru/27699039306bw26t.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/8ggfieL/sazuded.pdfIn PDF document text
    • http://fakaripeti.xyz/91909847971c04gx.pdfIn PDF document text
    • https://cdn.sqhk.co/xubewarow/PaichiP/jusumapufimivesojuvobe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382420/normal_60239f362709e.pdfIn PDF document text
    • http://service-hire.com/94769100890975lm.pdfIn PDF document text
    • http://vvd.bar/purivuwituwulegara9vip4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481985/normal_60027f79b6ab1.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
    • http://zumojuluru.epizy.com/hp_laserjet_pro_400_m401dw_driver_windows_7_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/come_prepararsi_al_celi_3.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_off0000eea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA0 5556 bytes
SHA-256: 8de8a480b4a35d8f4ba9fb6ea0475b4849c9c2a00b5b3d7960bfe08b5080c777
font_01_sfnt_off00010165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10165 10616 bytes
SHA-256: e37c1352d19947467510531be8c63ea7d1e5e5b4110bf84ba67be46c757fdb7c
font_02_sfnt_off00012585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12585 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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