Malicious PDF — malware analysis report

Static analysis result for SHA-256 4190ed0a17c5a000…

MALICIOUS

PDF

81.0 KB Created: 2021-02-19 11:29:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0237df21a3f13d1ddc38656186b316c9 SHA-1: 79df30a2654b2fdbfaf9c80c64e9f01300b6e787 SHA-256: 4190ed0a17c5a000825544aff0f57824980e15f22d8b5e2aebfaec47f495ba8b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to contain a lure related to grammar, suggesting a phishing or social engineering attempt to drive users to the malicious URL.

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/strik?utm_term=do+you+put+period+before+or+after+parentheses PDF link annotation
    • http://shoop-ft.ru/5390105196s7hdj.pdfIn PDF document text
    • http://gidusalutuwisut.iblogger.org/47157126467.pdfIn PDF document text
    • http://ourfutures.space/meme_template_buildergrot8.pdfIn PDF document text
    • http://discovljzg.fun/how_to_use_bionaire_humidifierhlwbh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386336/normal_601aee9b65e43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404108/normal_60244ae013db3.pdfIn PDF document text
    • http://easylearning.space/ufc_rumble_johnson_vs_cormier23xie.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443821/normal_600107e08977d.pdfIn PDF document text
    • http://xutuvulamarav.iblogger.org/rovimomatol.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/wemupajese/wapavurowajivuwasufusox.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/lizuzovutogabonoliri.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/zisuruju.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/60320795171.pdfIn PDF document text
    • http://vibesiwag.epizy.com/tamil_memes_template_zip.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/28925718911.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/ashoka_hd_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/how_to_connect_virgin_pulse_max_buzz.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_off0000e8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CC 5336 bytes
SHA-256: 7c18bac23ba8b62f990cc81c7492a624938eea1f18ec49b3587ca01539a4888a
font_01_sfnt_off0000faf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF2 10968 bytes
SHA-256: 35b7bcf320a952371d606d8109afed0908eb30d4366428affa218ab1ef6d068d
font_02_sfnt_off0001207b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207B 16348 bytes
SHA-256: 2334ade245ec46eaa3943be3e15553e8ac07f98e23f092e9c17c46eab61462e4

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