Malicious PDF — malware analysis report

Static analysis result for SHA-256 9702104680b4de59…

MALICIOUS

PDF

155.1 KB Created: 2021-01-17 08:49:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 12843659e22706d4dd45345c1c335d77 SHA-1: ee96523f74e7f757eb4c04c10f6165a3b57ba035 SHA-256: 9702104680b4de596101793283dda3aac9027842453d2a793748ea79ce0b144d
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 multiple embedded URLs, one of which is presented as a download link for an application, suggesting a social engineering lure to trick the user into downloading a payload. No scripts were extracted, but the presence of external URIs and the nature of the detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://traffset.ru/123?utm_term=carr+et+al+2003 PDF link annotation
    • https://cdn.sqhk.co/kefekawit/hgjjMjb/download_tyrannosaurus_rex_simulator_3d_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457320/normal_5fed1284c28e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405641/normal_5fcf488538caa.pdfIn PDF document text
    • https://site-1177706.mozfiles.com/files/1177706/2147709713.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/Jd2ghhe/28976149021.pdfIn PDF document text
    • https://site-1236897.mozfiles.com/files/1236897/drakor_mackerel_run_sub_indo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483349/normal_5fc9dad68b2d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411686/normal_5fa32cd6d8f00.pdfIn PDF document text
    • https://site-1249670.mozfiles.com/files/1249670/customer_journey_template_ppt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408865/normal_5faf33fe23d16.pdfIn PDF document text
    • https://site-1172776.mozfiles.com/files/1172776/48830148135.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473064/normal_6003af826855d.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/babetafaperaxov/monebesila.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/sa_li_file_khng_in_c.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20E6D 4844 bytes
SHA-256: ddf6180e3cd8b99239f7f4784cf54f6ef6e0a48eec50a191047c4a34ec692b04
font_01_sfnt_off00021ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21EF0 13108 bytes
SHA-256: 378d164bb98ce640b4eac76224c91984dcc61ff58cbd49036713daa85826f877
font_02_sfnt_off00024a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24A16 16112 bytes
SHA-256: 04c641d0aedeaa8c494855f42a2e9ae6fad9e3679126e7dc5c08fccc4b41c292

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