Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4b19096262ad77…

MALICIOUS

PDF

77.9 KB Created: 2021-02-27 22:53:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d3d4f1273c1fc8a79348ea59328c898 SHA-1: dc546dcaeef29a74dac3ec652d2dce8c80fb681b SHA-256: 2e4b19096262ad77d44edd7f043e754c2dc35e06a0221f6780983debbc20e5c6
104 Risk Score

Malware Insights

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

The PDF document contains an embedded URI pointing to a suspicious domain, and ClamAV detection confirms its malicious nature. The document body, though heavily obfuscated, suggests a lure related to job salary inquiries, which is a common tactic for phishing or malware distribution. The presence of external URIs indicates an attempt to redirect the user to a malicious site, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/123?utm_term=what+is+the+salary+of+an+operations+manager+at+amazon
    • https://static.s123-cdn-static.com/uploads/4489595/normal_5ff0a2bc78655.pdf
    • http://help-ruleviolation.com/dota_2_clockwerk_guidetwtr2.pdf
    • https://cdn-cms.f-static.net/uploads/4477913/normal_60349093d164d.pdf
    • https://cdn-cms.f-static.net/uploads/4373520/normal_6026f3578eb99.pdf
    • https://cdn-cms.f-static.net/uploads/4384323/normal_6035da64710f6.pdf
    • http://timelessdecorum.com/88663697665fab0p.pdf
    • http://bristol-yalta.run/lonepotepajedoxufipuxalo0ue1.pdf
    • http://navaram.online/84292259892bmjzb.pdf
    • http://civiliscmq.online/80159877127ionla.pdf
    • https://static.s123-cdn-static.com/uploads/4459036/normal_5ff54462b16e3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kuboki/57319221465.pdf
    • http://xuxusemo.epizy.com/hardy_weinberg_equilibrium_problems_worksheet_answers.pdf
    • https://s3.amazonaws.com/gurowozenupifi/713657239.pdf
    • https://s3.amazonaws.com/tevomenil/vomiresojofaloguke.pdf
    • https://s3.amazonaws.com/gasodamuza/cb_background_hd_free.pdf
    • https://s3.amazonaws.com/xukirizugukugi/fuwukosama.pdf
    • https://s3.amazonaws.com/zodererezuzuxi/2374904071.pdf
    • https://s3.amazonaws.com/wovugi/cornerstones_of_cost_management_3rd_edition.pdf
    • https://s3.amazonaws.com/fukepez/20427838801.pdf
    • https://s3.amazonaws.com/kesumasaka/prescription_drug_label_worksheet.pdf
    • http://botemexake.rf.gd/82775250695.pdf
    • https://s3.amazonaws.com/roxawo/64469046261.pdf
    • http://fasilew.epizy.com/xuzexeluwowuvor.pdf
    • https://s3.amazonaws.com/sisaxu/paradise_lost_book_1_invocation.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_off0000f142.bin
14f66f830c3c435d756461e6367043aa049c45ef26df98fd2fafcd764f373ae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF142 5480 bytes
font_01_sfnt_off000103dc.bin
e2d41032cf568125dee1a9de31937d135eca2fb82b478e9112fa5ec38cc1ee5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103DC 11096 bytes

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