Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a27cddfa3acd1a5…

MALICIOUS

PDF

80.6 KB Created: 2021-02-11 12:31:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 68d712f9229ad4cc953484a5647a12e4 SHA-1: 9d93a636344c3676d91026356086fc3a83da7b6d SHA-256: 1a27cddfa3acd1a5ef2143f41594d2c7e83cc980f579d55632d0510ca6f138c4
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'maypoin.ru', which is likely a lure for users searching for technical documentation. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://maypoin.ru/123?utm_term=shigley%2527s+mechanical+engineering+design+8th+edition+solution+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4494149/normal_6023530300cd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408352/normal_5fccf35369662.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379616/normal_5fdc42c9a49d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419430/normal_5fdab802d988b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/apr_calculator_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/jotun_hardtop_xp_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/low_carb_cheesecake_nutritional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/mabuwaja.pdfIn PDF document text
    • http://ledafavegarawam.rf.gd/48202103083.pdfIn PDF document text
    • http://zujexig.epizy.com/potojivevazikusujafiba.pdfIn PDF document text
    • http://bajewilogofiro.epizy.com/affinity_diagram_template_excel_free.pdfIn PDF document text
    • http://didigixi.rf.gd/android_developer_jobs_in_singapore_for_freshers.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/gawofawesuvesotofik.pdfIn PDF document text
    • http://fupewazogapoda.rf.gd/10637584375.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/45183949599.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/chundari_vave_ringtone.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_off0000f9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AA 6004 bytes
SHA-256: affebf3b16375aae0037cece233ab488ddf619323b5e3feb061e0af176165651
font_01_sfnt_off00010e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E04 11800 bytes
SHA-256: 6670ea5a520374532d5252af6e85a866f589db7acc79d521a4d43fa1c6efb09e

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