Malicious PDF — malware analysis report

Static analysis result for SHA-256 65295807bdcc1f1d…

MALICIOUS

PDF

92.5 KB Created: 2021-03-22 13:40:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9faffa7f4f686537f2087818d50aeab SHA-1: 505bd9047b10ded0b7fd8abab6d7235fa9fe14e0 SHA-256: 65295807bdcc1f1d45efd4c346c6ac6cf9f2c1c5f6447266398155a2025023e2
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to Weebly-hosted PDFs with numeric slugs, indicating a potential link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/wix?keyword=neverwinter+trickster+rogue+guide
    • https://fenuwobubejugud.weebly.com/uploads/1/3/1/4/131454420/kubexujiwogarat.pdf
    • http://specrazreshenie.com/first_alert_p1210_3_beepsis6xs.pdf
    • https://zoxukumej.weebly.com/uploads/1/3/4/3/134327216/xelejop.pdf
    • https://jazemajotejavux.weebly.com/uploads/1/3/2/6/132681398/6418102.pdf
    • http://optalpha.com/vogepenazobugewasem06zyf.pdf
    • https://wemupubipu.weebly.com/uploads/1/3/5/3/135331653/senewapagiwiw.pdf
    • http://jadebey-x.com/332184744560q9z3.pdf
    • https://zuwubusonelab.weebly.com/uploads/1/3/0/7/130739898/leravoxusoxefadatib.pdf
    • https://selokifasafu.weebly.com/uploads/1/3/4/3/134383977/139e9f453181.pdf
    • https://godanikepogi.weebly.com/uploads/1/3/4/5/134509841/talopeda.pdf
    • http://voxofixixaj.iblogger.org/wapewuj.pdf
    • https://jetapixivokob.weebly.com/uploads/1/3/4/7/134726526/760badb3c69e24e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cd70d4e5-4a1a-4071-96d1-f2415ea5ece1.filesusr.com/ugd/7f46b5_eb5b5dbd78ba4039902907404c9a6e1b.pdf?index=true
    • https://s3.amazonaws.com/somisilegex/carl_rogers_unconditional_positive_regard_quote.pdf
    • http://popadugabi.rf.gd/blackbird_uke_tab.pdf
    • https://4b523d79-2bc6-404f-8e52-0acae4d2cb03.filesusr.com/ugd/fe1b41_95af32b01f974d419a1e009589c23cc9.pdf?index=true
    • http://perunibasud.epizy.com/wobefaxesubexetuxadokij.pdf
    • https://s3.amazonaws.com/wifukedot/puxezukugebawo.pdf
    • http://faravusema.epizy.com/dafifagaborikozik.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b76.bin
e5b861108a9aa9ac1130bb4ee6b8efb1ab75c9139fd816dbbd36842e7bc3f29b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B76 5052 bytes
font_01_sfnt_off00013cd7.bin
b65237137a3e8ad55fef9c789a1a4fa95f69f899bc61c01803b08cfcb50b9137		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CD7 11552 bytes

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