Malicious PDF — malware analysis report

Static analysis result for SHA-256 953973a5479b8cf4…

MALICIOUS

PDF

80.8 KB Created: 2021-01-24 19:59:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8ba2a2ef1da9cb6998f699982bb75e3f SHA-1: 05829aa522bd0046770672a8e6166f6e574272d2 SHA-256: 953973a5479b8cf4f34f2e39d433e3d4a78883e6990988c528873f71414f553d
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting and another pointing to a potentially malicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

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://bologen.ru/123?utm_term=inflation+rpg+hardmode+guide PDF link annotation
    • http://fruct.space/evacuees_meaning_in_marathisc8qu.pdfIn PDF document text
    • https://vidijizuv.weebly.com/uploads/1/3/0/7/130776341/pajorerujekunudabu.pdfIn PDF document text
    • http://wide-take.top/10038152500wczqa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fudewalazakukug.epizy.com/20336286379.pdfIn PDF document text
    • http://xipipowateselok.epizy.com/57196209552.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/cryptic_drinks_quiz_questions_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/zurupozevogewibebefow.pdfIn PDF document text
    • http://dibadedogiw.epizy.com/30554784656.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/77060075242.pdfIn PDF document text
    • http://runesufosufej.rf.gd/manesik.pdfIn PDF document text
    • http://kotasogova.rf.gd/congratulations_on_your_new_position_template.pdfIn PDF document text
    • http://vokutenux.epizy.com/vubid.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8B 5212 bytes
SHA-256: e7f8d9a2e1ac53f54f628d4669c99fcecdc9c30af549c2c647b4963129eb1db9
font_01_sfnt_off0001101f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101F 11108 bytes
SHA-256: 97ff3cd9079e877bcad559e781ee9bea5dea967375e8ff27657b1157381cabb8

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