Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd9e009a8ed7550…

MALICIOUS

PDF

60.9 KB Created: 2020-12-17 22:52:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8416c56b12f38fc2c2d43053cbec5338 SHA-1: c3fc76b1142754a8b57061c4c48454d9952f42c6 SHA-256: 6bd9e009a8ed75508c7cc8c5ec950d32a99a13071b29f5a05d55884a48d26785
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/strik?utm_term=psychology+ib+guide+2016'. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The ML classifier assigned a high probability of maliciousness. The document body appears to be obfuscated or corrupted, but the presence of a malicious URL strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/strik?utm_term=psychology+ib+guide+2016
    • https://static.s123-cdn-static.com/uploads/4387928/normal_5fc599f6586f6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc28a899698b02c7f2b0c7e/t/5fcb1eb81df7590d80dac131/1607147192945/54724177759.pdf
    • https://uploads.strikinglycdn.com/files/431c2a26-6318-43ac-b66e-12881408a0f3/5187093999.pdf
    • https://static1.squarespace.com/static/5fc0f485cd1e280355d49316/t/5fcf5c591a78ee5f0165b2d1/1607425113917/51989000431.pdf
    • https://uploads.strikinglycdn.com/files/d8392a4b-ca4a-427f-bad4-a632ed5a8dc1/foketetobuxufenesija.pdf
    • https://static1.squarespace.com/static/5fc54c636609fd0ee7ae99b9/t/5fd6367d102ca46975dd20bb/1607874175042/2018_standard_deduction_worksheet_for_dependents.pdf
    • https://s3.amazonaws.com/legipalofi/17621803999.pdf
    • https://uploads.strikinglycdn.com/files/32bfe5a2-cdff-4d41-9daf-78c27037b2e0/splice_2_trke_dublaj_izle.pdf
    • https://static1.squarespace.com/static/5fc18950b8467722f1d8bdf7/t/5fce591b83d2ac65cc4583ee/1607358747590/bomber_jacket_leather_couch.pdf
    • https://uploads.strikinglycdn.com/files/75debd18-52fe-4498-8c74-14edd7c268fe/netepopofarudupo.pdf
    • https://static1.squarespace.com/static/5fc35270bdb33045eed1c2ec/t/5fc922b87572a559743bae77/1607017144857/darker_dungeons_rpg_review.pdf
    • https://static1.squarespace.com/static/5fc55cbca5bc066edfc3531b/t/5fcd7ca574a40730fbaf3b15/1607302314185/lg_xboom_pl5_vs_pl7.pdf
    • https://s3.amazonaws.com/pewibim/banana_tree_adaptations.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf3e26a371610b8769ff7/1606218724292/bewulexu.pdf
    • https://static1.squarespace.com/static/5fc64b09f7cf8c75404f74c5/t/5fcedc1c505b451de17cc10f/1607392284698/car_gear_shift_knob_custom.pdf
    • https://static1.squarespace.com/static/5fc5340ff9866f3fd2f0118d/t/5fd20bb0d97b572b89e04bf0/1607601073054/discord_groovy_bot_youtube_playlist.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_off0000b07d.bin
a0d55d1611ccc17020e6eb37f516256fa1a5d88edc3655765bbe834141919024		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB07D 5620 bytes
font_01_sfnt_off0000c3a9.bin
b13451f4591d3b660d6df2b508c42955aa39a98915cd31a87961cf0bbb6fd39c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A9 10020 bytes

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