Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb8a78ecc53d1f12…

MALICIOUS

PDF

90.1 KB Created: 2021-03-22 07:57:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2394dcd6754d920e8f657433ff08142a SHA-1: d08bcbe664848368eecd560f3dd3d5f7b91a6494 SHA-256: cb8a78ecc53d1f12c887867d77de94db0faeb1733ac3c797152b748ed46a2383
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=liga+cesar+chavez+santa+rosa
    • https://cdn.sqhk.co/sowojusawepu/jdifjbV/gourmet_race_tom_and_jerry.pdf
    • http://mumolazesinidix.getenjoyment.net/nutiwodutakoxizoluzu.pdf
    • http://gopadaxin.mywebcommunity.org/74858029222.pdf
    • https://cdn.sqhk.co/xizemeginu/5ij1Dgi/blue_sky_squadron_kairosoft.pdf
    • http://fumatiw.mypressonline.com/temizisozufeneno.pdf
    • https://cdn.sqhk.co/zojixemem/hpYhgCJ/big_button_launcher_apk.pdf
    • http://rafupofamurawaf.mygamesonline.org/ges_business_management_syllabus_for_shs.pdf
    • http://bulibujirifubof.scienceontheweb.net/body_language_reading_techniques.pdf
    • http://nanonewe.scienceontheweb.net/percy_jackson_titans_curse_graphic_novel.pdf
    • https://cdn.sqhk.co/migazajigum/Tghhfhg/87022365595.pdf
    • https://cdn.sqhk.co/bawijodol/rjhGvgd/7227578120.pdf
    • http://viwavidif.getenjoyment.net/difference_between_corporate_level_strategy_and_business_level_strategy.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gawabog/81368858113.pdf
    • https://s3.amazonaws.com/fatikonavori/who_is_the_voice_of_mando_in_the_mandalorian.pdf
    • https://s3.amazonaws.com/gonafoziguwewe/15644412554.pdf
    • http://xologikaju.atwebpages.com/baofeng_uv-5r_review.pdf
    • https://s3.amazonaws.com/fajujiju/93747731131.pdf
    • http://jemukiguwuw.myartsonline.com/bissell_little_green_formula_msds.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_off00011f64.bin
b0833dbd982d10220dc92015b4991bd3d88e87e8b6976dca9e85cd25f4abfaff
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F64 5080 bytes
font_01_sfnt_off000130c1.bin
ffff266e92cb8babefeb0353c58e38f4563a75952c5c1b9422dcc7fb1ec384c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x130C1 12636 bytes