Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e091d532a2e8953…

MALICIOUS

PDF

68.3 KB Created: 2021-02-06 08:51:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8fecce53d1aea77f6f1fe26cfce76d59 SHA-1: d09e7f7f4d345f45ec0576048639fa868c1bc661 SHA-256: 2e091d532a2e89530ce0eac60bb3d647056667dff24d8824b88e1e0a20f09b35
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it may contain malicious JavaScript or exploit content to facilitate this lure.

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://jacksth.ru/aws?utm_term=indian+anthropometry+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390995/normal_600b547906fc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490917/normal_601875ec1a20d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369316/normal_5fca863c6fb2b.pdfIn PDF document text
    • https://ronudinogem.weebly.com/uploads/1/3/1/3/131398573/663bb1a1.pdfIn PDF document text
    • https://lugexobamav.weebly.com/uploads/1/3/5/9/135965248/karakuzalavafusaga.pdfIn PDF document text
    • http://natikolom.site/lonely_island_album_download8ss20.pdfIn PDF document text
    • http://online-sistem.site/alter_ego_1_freeiae13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501360/normal_5fe14224cae3f.pdfIn PDF document text
    • https://jafakatulo.weebly.com/uploads/1/3/4/3/134353771/vujotiwebuveg.pdfIn PDF document text
    • https://sitofozaliwi.weebly.com/uploads/1/3/4/3/134355749/1796154.pdfIn PDF document text
    • http://piter.store/neptunia_rebirth_3_ending_guidemjbhd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370097/normal_5ff6d3d517329.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/farefasejikap/bangladesh_newspaper_app.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/sublime_json_formatter_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/gokarna_trip_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/free_tv_online_indonesia_for_android.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_off0000cf59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF59 5112 bytes
SHA-256: 4364303832f586fddc7192bf524de8bfe6d8cf4c137a85f11cb50b9f7f194be6
font_01_sfnt_off0000e09e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09E 10592 bytes
SHA-256: 35b585dc73c15a43411d9b9a5f52062dcf8467141bdf83eb731c7c100914ddf0

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