Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ba0fb88f1c12a3…

MALICIOUS

PDF

74.7 KB Created: 2021-03-03 15:15:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7f814e84d5934d9bbebd5d615e35a4ad SHA-1: 19aca3b7111b46014448b3375d049de4a54953ea SHA-256: f5ba0fb88f1c12a33de9970b5e1d951af897020466e2df8c0e01d88519b2fc87
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier 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 credential harvesting scheme. The document body, though heavily obfuscated, appears to be a lure related to universal oven elements, aiming to trick users into clicking 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://zajinet.ru/wb?keyword=are%20oven%20elements%20universal PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480581/normal_602bf5a04863e.pdfIn PDF document text
    • https://cdn.sqhk.co/rumomezojeku/a1jj00b/ionic_hammer_config.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetovukufo/jcgeKFI/favuwedavemidedavotusev.pdfIn PDF document text
    • http://duxeluwezix.iblogger.org/zadumen.pdfIn PDF document text
    • http://ludshop.xyz/cambium_network_software18ns1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444852/normal_5fea1f59beda5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383703/normal_5feeb9afe42c4.pdfIn PDF document text
    • http://kalanuso.iblogger.org/army_after_action_review_template.pdfIn PDF document text
    • http://steel-lipetsk.ru/download_21_savage_issa_album7h5ex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406789/normal_5fcb9abf0f02c.pdfIn PDF document text
    • https://cdn.sqhk.co/faxinomitux/6Kha4jd/bleach_mobile_3d_character_tier_list_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/vitozogog/Xaihojj/raft_survival_simulator_apk_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_6022bbf4c320d.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/susonanezaj/pojusevezexaxokon.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/66931192935.pdfIn PDF document text
    • http://linakagiwabofa.epizy.com/32340623619.pdfIn PDF document text
    • http://xuxusemo.epizy.com/we_the_arcturians.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/gukibiju.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/54996363129.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/the_crucible_act_1_quotes_and_explanations.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_off0000e817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE817 4880 bytes
SHA-256: afcae5a8164ff70cdd147d9ce6173f90faf18e2095fe6196749a0a0df5260618
font_01_sfnt_off0000f898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF898 10948 bytes
SHA-256: 9ae1a9fbb5d8ab8fcb58253b072de0229b3b2145eef0da8fed9f72102ca4fc3a

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