Malicious PDF — malware analysis report

Static analysis result for SHA-256 c537e39189f5ed02…

MALICIOUS

PDF

283.8 KB Created: 2020-12-27 12:02:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 77b0708bd2981e7ca6e464d8b60f2d9e SHA-1: 56cd60262079900c048580db2e66a0828eed741f SHA-256: c537e39189f5ed020e7bd620babf8ca7c2f2d518def808a1b6f208393c9d5d55
96 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 ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to 'https://trafffi.ru/strik?utm_term=for+kobe+lakers', which is highly suspicious and likely serves as a lure for phishing or malware delivery. The document body, though heavily obfuscated, contains text related to 'kobe lakers' and the authoring application, suggesting a potential social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9427

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=for+kobe+lakers PDF link annotation
    • https://cdn.sqhk.co/wubumeze/hj1jehc/3746365955.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/QHDgcF2/ragdoll_car_crash_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/peferitukofa/UidhYjg/spina_bifida_types_radiology.pdfIn PDF document text
    • https://nikojaba.weebly.com/uploads/1/3/4/6/134683319/7ffa6bfa35baa.pdfIn PDF document text
    • https://rosiruwolokixa.weebly.com/uploads/1/3/4/7/134765588/nesadamoxijuse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487206/normal_5fac27649b127.pdfIn PDF document text
    • https://pogugabumivo.weebly.com/uploads/1/3/1/3/131381840/xaduxabisuximek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dogazisuze/wiliz.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/probation_extension_letter_format.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/padusobonolotobasirunava.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/danza_azteca_paloma.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/28868012361.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/google_opinion_rewards_hack_apk_download.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off000417bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x417BD 32948 bytes
SHA-256: 8731fdd13ba824159104276c57629111905a839e73aa67a3df51e2f0db8d61c1
font_00_sfnt_off0003cfd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3CFD4 3500 bytes
SHA-256: db9493e20ae47d79b35e527de58fc41c5c3451da15d3df1171b68ff45e2df49f
font_01_sfnt_off0003dc60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3DC60 4392 bytes
SHA-256: 3e18a93a1a33cb45efbc783dfe4906ec7ac7e2e86e4cade389b7deff51e2083e
font_02_sfnt_off0003eb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3EB4D 13320 bytes
SHA-256: a0928c0d90a773cfd8dbf0438fb27e7d560df53507cfbb7ecc88a28d5888c34b
font_04_sfnt_off000451eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x451EB 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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