Malicious PDF — malware analysis report

Static analysis result for SHA-256 3676360d944d73bc…

MALICIOUS

PDF

70.1 KB Created: 2021-01-01 14:14:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08a292afa148dbea00186f41d79eb5d1 SHA-1: 12dd919794fa50f7b2d56024c3e1cd581c2e807d SHA-256: 3676360d944d73bce9e591433ba4c1a3249b27705211d2b1e451f562b80e06e1
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_SEO_LINK_FARM, indicating a large number of external links, with one prominent URL being traffnew.ru. The document body, though heavily obfuscated, contains text related to 'nba 2k17 vc generator no survey no download required', suggesting a lure for a scam. The presence of external links and the nature of the lure point towards a phishing or scamming attack pattern.

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/123?utm_term=nba+2k17+vc+generator+no+survey+no+download+required
    • https://cdn-cms.f-static.net/uploads/4389804/normal_5fb58736ebfbf.pdf
    • https://static.s123-cdn-static.com/uploads/4406241/normal_5fc6c2f0264eb.pdf
    • https://static.s123-cdn-static.com/uploads/4371013/normal_5fdd5eb5270cc.pdf
    • https://cdn.sqhk.co/fujalapevame/jihijaE/learning_to_speak_english_online_free_lesson.pdf
    • https://static.s123-cdn-static.com/uploads/4479212/normal_5fe2aed6c3d8f.pdf
    • https://webakutukulufu.weebly.com/uploads/1/3/2/6/132683024/a66867330a96c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wupixufekijax/chemistry_limiting_reactant_problems_worksheet_key.pdf
    • https://s3.amazonaws.com/mijedusovineti/220485660.pdf
    • https://s3.amazonaws.com/neviwove/rangers_apprentice_book_2_free.pdf
    • https://s3.amazonaws.com/muvemasoxaji/coliformes_en_alimentos.pdf
    • https://uploads.strikinglycdn.com/files/f0f202cd-8533-4672-8513-f829fbaacb2f/rems_mars_weather_app.pdf
    • https://s3.amazonaws.com/pozokimepe/rumilakijasoka.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_off0000ceab.bin
7e9a8ee0853ce1c8262bdb0153b9da724257033df601d1bde11fe9a51f9e1bc2
pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAB 5924 bytes
font_01_sfnt_off0000e306.bin
969ce6d2979611fc41d5a26eec372931abff1485d98bdbe73d6d183aa1d60202
pdf-font-stream PDF embedded font (sfnt) at offset 0xE306 12248 bytes