Malicious PDF — malware analysis report

Static analysis result for SHA-256 9600ef994b065646…

MALICIOUS

PDF

70.9 KB Created: 2020-11-24 05:48:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 4654682494a297b9d55ac1210f79ae97 SHA-1: d2f9cf86ef5d8640160812f50ad4d965c30b127b SHA-256: 9600ef994b065646b7c7f62ea89c369fea81fdfcb528408969af2b58be8d0688
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous embedded URLs, including one pointing to known malicious redirector infrastructure. The primary function appears to be redirecting users to potentially malicious websites, likely for phishing or scam purposes. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/aws?utm_term=ks3+english+comprehension+worksheets+with+answers In PDF document text
    • https://sirakogosi.weebly.com/uploads/1/3/4/6/134600403/ledavunerubomezo.pdfIn PDF document text
    • https://jowiroluka.weebly.com/uploads/1/3/4/3/134336896/gufuwabama-tekebepevagawi-pojiside-kevigetixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470825/normal_5fbc3c6f21156.pdfIn PDF document text
    • https://pirovosarelivo.weebly.com/uploads/1/3/1/4/131406751/f2784f31731ba.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/gujukowafe_gurefasizelowe.pdfIn PDF document text
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/lawizutuvuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372982/normal_5f94571d38fa2.pdfIn PDF document text
    • https://kekulewu.weebly.com/uploads/1/3/4/3/134398637/0046ec9ea0efbed.pdfIn PDF document text
    • https://febewizonobuwom.weebly.com/uploads/1/3/4/3/134311996/bexeguwe-pomuvu-sofuvuribu-robak.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/xowobali.pdfIn PDF document text
    • https://vabejodero.weebly.com/uploads/1/3/4/3/134378136/8928667.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381297/normal_5f8e4fb6e6841.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/220b33f5-4b3a-4fa4-b6b6-a402242d4083/wozedebilogokoremidusozi.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_off0000d625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD625 5636 bytes
SHA-256: 7100a02f727ba35f5c65cd57d13351789910b650d1040306d1da2e5f20f6075e
font_01_sfnt_off0000e937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE937 11028 bytes
SHA-256: dedb949ea47171837d4235c7501863a4e53630742cf00f8ba7a97bafa0150f08

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