Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff9cc49765a484f…

MALICIOUS

PDF

73.6 KB Created: 2021-03-28 14:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dc64fe7d4d7f16820b72b231791b707 SHA-1: b0356ed20c7a100a74db3ac0e868b8c7a68a4d36 SHA-256: 9ff9cc49765a484f7bbc3e09b3c4af98ce38829810572f8bda1dae79d05379f0
116 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, with heuristics indicating it contains external URIs and a callback phishing lure. The embedded URL and numerous other URLs point to domains associated with malicious activity. The document body, though heavily obfuscated, contains text related to 'Payday loans western union', aligning with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://botokaw.ru/wix?keyword=payday+loans+western+union
    • http://study-english-05.site/dovixutozulesutgly0.pdf
    • http://dutov.org/govuwolazumaneleksumcb.pdf
    • http://xokapik.mywebcommunity.org/blood_relation_questions_and_answers.pdf
    • http://uscreditreport.info/zend_avesta_em_portuguesdltjk.pdf
    • http://brumbum2.xyz/80344101899uugnp.pdf
    • https://cdn-cms.f-static.net/uploads/4496605/normal_605858e080555.pdf
    • https://cdn-cms.f-static.net/uploads/4467612/normal_603ebc59304ba.pdf
    • https://cdn-cms.f-static.net/uploads/4476782/normal_60588cb762977.pdf
    • http://idealicaitalia.website/xiroxi1jhnh.pdf
    • https://cdn-cms.f-static.net/uploads/4445726/normal_604e7dae11a94.pdf
    • https://cdn-cms.f-static.net/uploads/4481520/normal_6009ce1e00cfd.pdf
    • http://bezprovodov.guru/confession_of_a_shopaholic_book2xwgx.pdf
    • https://cdn-cms.f-static.net/uploads/4480876/normal_6054e5523b182.pdf
    • https://static.s123-cdn-static.com/uploads/4472764/normal_5fe0df33476dd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zujejuxuj.rf.gd/xejufisenekizawetugu.pdf
    • http://romezegipoxo.epizy.com/23469794244.pdf
    • http://gitojaxekeveki.onlinewebshop.net/89963610432.pdf
    • 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_off0000e0b3.bin
ebc612ae31941de24266c1527163e952437171893f24844d84fbb9e9c7998288
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B3 5012 bytes
font_01_sfnt_off0000f1e0.bin
24b5b1bb41ea9f280ffd1aaff0d5659a46829806d79baae2a0f1bb8375afa731
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E0 11776 bytes