Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0b65e9f96d351c5…

MALICIOUS

PDF

76.6 KB Created: 2021-01-31 21:53:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: edeb4168ba5226e534adf1a39d9f5eef SHA-1: 4449be901a06ff1428c133e419c26e06b4e41e96 SHA-256: a0b65e9f96d351c5d620fde5e1720e7e6c3625ec32338a04fb9cdd5ed4eb765c
146 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm for SEO manipulation or to host malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/aws?utm_term=place+value+house+template PDF link annotation
    • http://italiabeach.space/cisa_study_guide373o7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380881/normal_6011dfc193a9d.pdfIn PDF document text
    • https://cdn.sqhk.co/geroterunetu/hZ2jheT/ducks_unlimited_store_canada.pdfIn PDF document text
    • http://servicesforsupport.com/96794012780tdqaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464523/normal_5fd6d95bae60c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487197/normal_601422c8126c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444096/normal_60050f9c6f5ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463272/normal_5ff92c61667ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406241/normal_5ffadee25e753.pdfIn PDF document text
    • http://prostochillforum.fun/53688922405ozfcw.pdfIn PDF document text
    • http://meletemobu.iblogger.org/wadenu.pdfIn PDF document text
    • http://twirlini.com/19806854658nq0fe.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/zicigPc/nikejubo.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://babupit.epizy.com/bridge_rectifier_with_centre_tapped_transformer.pdfIn PDF document text
    • http://newiroxupamorik.rf.gd/graves_jungle_guide_8._10.pdfIn PDF document text
    • http://fefadipif.rf.gd/sazatamepelik.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_off0000e2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E1 4864 bytes
SHA-256: 47c180afdcb0f645b62a3f5cfa11d6703379c67d273184479c52e3ecad380634
font_01_sfnt_off0000f376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF376 10456 bytes
SHA-256: 6f664bbc4eef56806e78cc7b388a3546a25496c7c3b0af3065dbf9ebea982bd5
font_02_sfnt_off00011704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11704 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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