Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc46d2c94fe54a5…

MALICIOUS

PDF

78.5 KB Created: 2021-02-20 23:19:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 14db2379bc5b27eed7fb87f5570af14e SHA-1: 20f65710622045d12d9000f925ffbf4bd8895c92 SHA-256: 0bc46d2c94fe54a541dcb69a60a8b09a64e36d6fdd8451467a18a867ab1baf92
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely part of a phishing campaign. The document body, though heavily obfuscated, suggests a financial theme, reinforcing the phishing pretext.

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://jacksth.ru/aws?utm_term=bill+of+exchange+and+promissory+note+difference PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480753/normal_5fe93761c4bc5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504870/normal_5fdd35ebe711d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408321/normal_6023e945af39c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_601951b51a22a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420025/normal_5fe0ff7b727bc.pdfIn PDF document text
    • http://fomamiforepu.22web.org/gisubovomosirivawisopuwi.pdfIn PDF document text
    • http://my-favshopf.online/zojupakelimebifetwept.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409256/normal_5fd6812b7cc7a.pdfIn PDF document text
    • http://vakekaninu.iblogger.org/titewovimozubix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486033/normal_601a52601ad67.pdfIn PDF document text
    • http://zathkatow.xyz/xonunenuxelagefezelalevcqpm.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/metakibeme/clases_sociales_definicion.pdfIn PDF document text
    • http://xonelamurojili.rf.gd/66341874198.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/22171575699.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/80390553056.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/asus_drivers_and_manuals.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/zanaxow.pdfIn PDF document text
    • http://setevibebevu.epizy.com/dekavuzutotepidibinevemol.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/guxobafivovijolafomuzetu.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/90090563214.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/fetijite.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF69 5788 bytes
SHA-256: 8181913d74307ec3fa510246cdabc50789d587200300d66e59cf437abbe7fb2d
font_01_sfnt_off0000f30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30B 10424 bytes
SHA-256: b3b2b6c3f32e74b7bc96af6d1a2035af6b40d647668836f60eb8d66246153288
font_02_sfnt_off000116e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E6 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8

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