Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae45328beb722b32…

MALICIOUS

PDF

71.0 KB Created: 2021-04-07 04:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adb1b709693fcd2af3f6520b75003483 SHA-1: 92adb9e0e4d32bf6bdd024e7c957e0325549df00 SHA-256: ae45328beb722b3273784b3a474ce19a29695cebb131dd9cece80582164f35f1
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. The embedded URL points to a suspicious domain, likely part of a phishing lure to trick users into downloading further malicious content. No scripts were extracted, but the PDF structure and external URL are strong indicators of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=brain+droppings+free+pdf
    • http://dkmz1.club/logekakoxodejuxazogudiku7p4w.pdf
    • http://milky-rp.space/raravibimmz3nt.pdf
    • https://vulodimov.weebly.com/uploads/1/3/4/8/134880101/sopofapijapopajew.pdf
    • https://nozifudofo.weebly.com/uploads/1/3/2/6/132681081/lijurelep-koguvutudud-dopunufope-wawavifedero.pdf
    • https://static.s123-cdn-static.com/uploads/4500895/normal_6002ed64cfbfe.pdf
    • http://firstsecu-paypal.com/cajas_de_cartonue45x.pdf
    • https://cdn-cms.f-static.net/uploads/4391649/normal_60405dd09f5d7.pdf
    • http://physcoo.com/capital_inicial_acustico_nycs3nf7.pdf
    • https://dadojunolibete.weebly.com/uploads/1/3/2/6/132683289/9150907.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/popisiburewixuj/rolabazulogodoruxavo.pdf
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_7bb616204e6a49a2a99883ee340abb5a.pdf?index=true
    • https://s3.amazonaws.com/kosipefojaw/filmywap_movie_2018_bollywood.pdf
    • https://s3.amazonaws.com/zebarufuridorur/accident_prevention.pdf
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_9cfe9ff7f20c4c7dbb04a6c0e57057b3.pdf?index=true
    • https://c33c3ce4-fa2f-4f19-9477-7a801b41b29e.filesusr.com/ugd/ebbcbd_031a058f808d4412ae0b48ab50c1c4ad.pdf?index=true
    • https://ca7c05ed-d233-4774-9cf9-08ff86aa6c73.filesusr.com/ugd/b42fd6_3cd4cded1337452791691ef7afa02234.pdf?index=true
    • https://83bd47e3-138d-48d8-8d00-514fe13b91b0.filesusr.com/ugd/c87a2f_9caad64ef71c4ea9ad7aef59a2ca2f91.pdf?index=true
    • 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_off0000d88b.bin
19fabffdb103becae2e81a7028c0ec816d95534481c285e10eea5d2af4166a21
pdf-font-stream PDF embedded font (sfnt) at offset 0xD88B 5224 bytes
font_01_sfnt_off0000ea64.bin
e00ac91a5212c234ee33b2c570b87da3841a6b0abe460d2c5396ed378bbd199d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA64 10812 bytes