Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a313322f3433292…

MALICIOUS

PDF

73.0 KB Created: 2021-03-02 21:36:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 567ad8a035996605be8fb5d0ffabc3ca SHA-1: 23cf53616a0162e4ce26e469b4064ed0749f3e27 SHA-256: 0a313322f343329256e13bf171996bc411e79724d2d2b606f968c14bf5d48939
104 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. The embedded URL and the heuristic indicating a fake invoice lure suggest the document aims to trick the user into visiting a malicious site. No scripts were extracted, but the PDF structure itself likely facilitates the malicious redirection.

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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://maypoin.ru/strik?utm_term=how+do+you+see+journal+entries+in+quickbooks+online PDF link annotation
    • http://tekplafond.xyz/lininetizajemasw266.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449599/normal_5fff4ae807560.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456387/normal_5ffd0f64bbac0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385026/normal_601152edb7655.pdfIn PDF document text
    • https://cdn.sqhk.co/saligoliti/ibij39c/88845885986.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368951/normal_5ff65654c35f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458125/normal_60174a5345c0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450636/normal_5ff06b413270e.pdfIn PDF document text
    • https://cdn.sqhk.co/lixipadiwel/hsVjhij/96660387417.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393348/normal_5ff0a4873f867.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368488/normal_60372faea3939.pdfIn PDF document text
    • http://digitalcalakk1.xyz/31919804771pnuwz.pdfIn PDF document text
    • https://cdn.sqhk.co/xekejegixawo/M7Uhbha/megan_rapinoe_nike_salary.pdfIn PDF document text
    • https://cdn.sqhk.co/xudekutof/gdzggib/disabedabeze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFE 5496 bytes
SHA-256: d2f895e4faef930504d3919325da00c552f8933b0af741590477d1a8e54d5254
font_01_sfnt_off0000f2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CF 10632 bytes
SHA-256: ade951484917cebf07b98469e52c35ae2ea1a036351dbb60d95f71321307a013

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