Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb9331726c4e8358…

MALICIOUS

PDF

76.1 KB Created: 2021-03-20 22:16:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 9944248ac165fc8d4fbdd6944e8961bd SHA-1: 49d90491f841da3d6fdd30c4ed32859ab02cbe67 SHA-256: fb9331726c4e835887b0de85aecd2402a94fbe0a1e6cefb2b37c418378a0e1d0
96 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. The document body, though heavily obfuscated, appears to reference a local event to provide a pretext for the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/wix?keyword=spokane+fairgrounds+swap+meet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479710/normal_6052791663a1b.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/359020915142hzxm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475379/normal_6040daa5cb0e1.pdfIn PDF document text
    • https://cdn.sqhk.co/netesatova/xhfjehd/house_painters_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/50R3qXC/90136221045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454287/normal_6015c474c2d57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423757/normal_601f1fe297fe8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386848/normal_5fd03968d664d.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/ROicVgF/51546230299.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/1BgecWx/change_outlook_auto_reply_from_iphone.pdfIn PDF document text
    • http://spiritstudio.ru/criminal_justice_reform_organizations_georgiaky3r2.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/kibavutibeved/19142579896.pdfIn PDF document text
    • http://fumibomi.epizy.com/tedegipu.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/2069158335.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/byju_s_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/mil_gaye_chora_chori_song.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/bedtime_lullabies_for_babies_free.pdfIn PDF document text
    • http://nirirojigupe.epizy.com/14374878965.pdfIn PDF document text
    • http://veduredetud.epizy.com/29907675208.pdfIn PDF document text
    • http://wobudesupak.epizy.com/ganesh_aarti_songs_telugu.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_off0000e9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EF 5588 bytes
SHA-256: d36b5400fb2ca1f41c642a02a94018a4073c0d98c24555180de0e7a1d5cd8e92
font_01_sfnt_off0000fcfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFA 11716 bytes
SHA-256: 91fafb5492cbbf8b1a9b7ec14324ef1f201d517ab40db2cbacf11044137d0d61

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