Malicious PDF — malware analysis report

Static analysis result for SHA-256 2264cfc7c8351045…

MALICIOUS

PDF

70.4 KB Created: 2020-12-23 02:50:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9392ff7524e0e1f06f1abc9f1fab5d62 SHA-1: 54d34681496af0147c4dbf15a74125fa15977134 SHA-256: 2264cfc7c83510457575a66d1793e15b9c2fcb40ccea6ab98ae37a7ad6d21f18
156 Risk Score

Malware Insights

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

This PDF file contains numerous external links, many of which are part of a link farm designed to attract search engine traffic. One prominent URL, 'https://traffnew.ru/strik?utm_term=plants+vs+zombies+mac+download+cracked', suggests a lure for cracked software. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffnew.ru/strik?utm_term=plants+vs+zombies+mac+download+cracked
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/7729726d13.pdf
    • https://nupurotuxi.weebly.com/uploads/1/3/4/8/134854616/lorezexojoxuman.pdf
    • https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/jaxisosinur.pdf
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/4591516.pdf
    • https://sobeponul.weebly.com/uploads/1/3/4/7/134756425/jamarujelan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5c01fa91-34be-49bc-9054-81ceb496d313/iphone_notification_panel_apk_download.pdf
    • https://uploads.strikinglycdn.com/files/106fff2b-fef8-4a60-be57-f2b3b59cdb15/free_live_stream_nfl_network_123.pdf
    • https://static1.squarespace.com/static/5fc0e46f24b06a7eb3ff1788/t/5fc18c23f3de5e49b59f3229/1606519845028/the_real_book_6th_edition_bass_clef.pdf
    • https://uploads.strikinglycdn.com/files/aa07a831-d02e-4e05-bd3b-c0880decc26e/welesobemigi.pdf
    • https://static1.squarespace.com/static/5fde95ce5b7bc966055f9f1c/t/5fdeb7df7514fb3b764d43e4/1608431586918/baguwamafigowikerile.pdf
    • https://uploads.strikinglycdn.com/files/7a9fcdb3-2758-4364-9911-6d13fb6bcc89/1493645021.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf595e18e72e5fdbcef90d/1606375778549/48333565383.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_off0000d514.bin
7593a441348dd64063284b23a3e645f4b4ef10ba4b34f7cf32347c8f9fbd8c36
pdf-font-stream PDF embedded font (sfnt) at offset 0xD514 5492 bytes
font_01_sfnt_off0000e7c7.bin
5f303962b93a28fa6d40d2b94e27c82ae4c0e17c4c3c970df89c1706f5cca634
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C7 10872 bytes