Malicious PDF — malware analysis report

Static analysis result for SHA-256 e41bab332a9c04c9…

MALICIOUS

PDF

76.2 KB Created: 2021-03-11 02:25:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e8010ba654ee8a1ef79a1f2334ae46a3 SHA-1: 47256565da3ae7a07a26b099629b0c73299f572e SHA-256: e41bab332a9c04c982b8a68221021a57812736db04b03add8e4edcd110ec368c
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'acceptable risk' and 'robin cook pdf' to entice users to click the malicious link.

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://jumiwimov.ru/award?keyword=acceptable+risk+robin+cook+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4499958/normal_5fffcb9fc95ea.pdfIn PDF document text
    • http://bigwin-1xbet.fun/famous_club_soccer_teamswhlv1.pdfIn PDF document text
    • http://1cats.space/zuwomereluzigekturz1.pdfIn PDF document text
    • http://fresh-ita.fun/2005_form_b_ap_literature_sample_essaysgwsbt.pdfIn PDF document text
    • http://tiktokfrance.fun/vibodefemazebug6jnae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460975/normal_5ff4c542d1676.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477635/normal_5fcd81fea4c77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382953/normal_603e28171e4ee.pdfIn PDF document text
    • http://callup.today/how_do_you_cancel_rosetta_stonehukuw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407102/normal_6003a6374ed3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443356/normal_6001c398d4220.pdfIn PDF document text
    • http://kzrovk.xyz/bulawurugobumh7lvj.pdfIn PDF document text
    • http://rukozhop-guide.com/buick_lacrosse_2010_manualdukdi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368762/normal_5fe9b7f351131.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fefekug.rf.gd/biodiversity_and_conservation_file.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/juvixifofatebofazadex.pdfIn PDF document text
    • http://wepilige.epizy.com/baixar_bet365_no_android.pdfIn PDF document text
    • http://tevisub.rf.gd/94689442633.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/calendar_2020_south_africa.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_off0000ed1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1C 5344 bytes
SHA-256: 6873c27d7bd0ee0f12a51f6cff0f7fdf8fb515ea3e0520d7d8f6b0120fcf1030
font_01_sfnt_off0000ff52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF52 10860 bytes
SHA-256: c3c30fc1f48850f60c31f75af3b49f3cb6829598c212ac07f9ec03213526eb28

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