Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b50f0fcab1e0fb…

MALICIOUS

PDF

72.7 KB Created: 2020-12-17 20:55:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c68aa9554945f929a7ce6e703f15f491 SHA-1: d5d2012e0818e8c1264a989bf09a65ad678e8736 SHA-256: 46b50f0fcab1e0fbc9803f831db47643eb07cc0a2ffcebb47d609c4498b1f68a
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in SEO poisoning or phishing attacks to direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URL 'https://traffset.ru/strik?utm_term=nfs+most+wanted+cheats+ps3' suggests a lure related to game cheats, which is then used to redirect users to potentially harmful content.

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-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://traffset.ru/strik?utm_term=nfs+most+wanted+cheats+ps3
    • https://static.s123-cdn-static.com/uploads/4501495/normal_5fcbc505a5583.pdf
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f8ed10d5e75a.pdf
    • https://cdn-cms.f-static.net/uploads/4471464/normal_5fb2c4997bd90.pdf
    • https://static.s123-cdn-static.com/uploads/4482618/normal_5fc64369aea46.pdf
    • https://boxomuti.weebly.com/uploads/1/3/4/0/134016719/tixogilitigu.pdf
    • https://pojojupekofep.weebly.com/uploads/1/3/4/7/134754506/vibegetodurapila.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static1.squarespace.com/static/5fc112c117e7202640eb3140/t/5fc1463d3c6ccf69f38ccfbd/1606501950367/buxovi.pdf
    • https://static1.squarespace.com/static/5fc5c6758139af0376668248/t/5fc61951eaf37e3b646ccc54/1606818130349/peserakexufa.pdf
    • https://uploads.strikinglycdn.com/files/625ce99a-5186-485c-84a0-fe1a35be631a/safety_first_grow_and_go_manual.pdf
    • https://static1.squarespace.com/static/5fc5c3ea16f6d44b07dfe25b/t/5fc6ab669b1ed03538ca1914/1606855526882/murder_hornets_washington_report.pdf
    • https://static1.squarespace.com/static/5fbffe61bf71053ccb0b2b06/t/5fcfc6fea8cbdc2f053b477c/1607452415488/download_bubble_shooter_2020_mod_apk.pdf
    • https://uploads.strikinglycdn.com/files/2f07fbcc-a802-4e3d-9c0b-1cc37fadbf79/ghost_recon_wildlands_achievement_list.pdf
    • https://static1.squarespace.com/static/5fc29f756609fd0ee79c7240/t/5fc78488a907d7439cdd6e66/1606911113641/92790929005.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d330.bin
6b4d216e17db3bffa1d282143d6fe095957f004cc16ab658dd2adcb651b00953		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD330 5232 bytes
font_01_sfnt_off0000e4e2.bin
e2cb41947b3a72b65c5f5278835d4433b0fb51a0efc3fe23838d02dde6a244de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E2 10200 bytes
font_02_sfnt_off00010798.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10798 4324 bytes

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