Malicious PDF — malware analysis report

Static analysis result for SHA-256 755e769ca6bc2325…

MALICIOUS

PDF

85.1 KB Created: 2021-01-23 15:24:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6316ba785d5a68dabbeb807d8e205a33 SHA-1: 70cad932d394a6773150dbd251d7e783d8aa1d39 SHA-256: 755e769ca6bc23251d1e55d4d35016255155729192ac85cbfe0e9156888f011e
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to malicious content or a phishing page. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. The presence of embedded URLs and the overall detection by security tools strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/123?utm_term=urdu+hot+stories
    • https://cdn.sqhk.co/sopaluwokaja/ggQ08hb/43750518007.pdf
    • https://cdn.sqhk.co/susojitigi/Jhd6Gso/sorafejanoxi.pdf
    • https://cdn.sqhk.co/mosugukasiba/zmkiiie/26238903570.pdf
    • https://cdn.sqhk.co/vojasipi/Ihbhj7v/dupupelevago.pdf
    • https://static.s123-cdn-static.com/uploads/4474206/normal_5fdd76d58f2e9.pdf
    • https://cdn.sqhk.co/mawejoxejobe/h4FUifi/play_free_online_tennis_grand_slam_games.pdf
    • https://cdn-cms.f-static.net/uploads/4486778/normal_5fe86c2be1a8c.pdf
    • https://cdn.sqhk.co/wudawagirus/H4jgwWO/townsville_city_crash_repairs.pdf
    • https://cdn.sqhk.co/tinolefowi/fgj6tjf/fazalazujo.pdf
    • https://site-1174981.mozfiles.com/files/1174981/hashiriya_drifter_1_racing_unlimited_money.pdf
    • https://cdn.sqhk.co/dedogupazib/UgcHjj8/juvaku.pdf
    • https://static.s123-cdn-static.com/uploads/4409113/normal_5fec16a373654.pdf
    • https://site-1168209.mozfiles.com/files/1168209/67253284730.pdf
    • https://cdn-cms.f-static.net/uploads/4497395/normal_5feaf0bd80ea8.pdf
    • https://site-1168027.mozfiles.com/files/1168027/kosakizipewozalal.pdf
    • https://cdn.sqhk.co/xisiwuba/eVnijdm/jofesakapavageraxuliva.pdf
    • https://static.s123-cdn-static.com/uploads/4366389/normal_5ff65cd552f27.pdf
    • https://static.s123-cdn-static.com/uploads/4426954/normal_5fdebf5ac5c80.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off00011379.bin
ba06f0e11e95fb0d6dc117ac38d513bbf805d6c55bad53f2f4b0ac0daf2e9afe
pdf-font-stream PDF embedded font (sfnt) at offset 0x11379 4664 bytes
font_01_sfnt_off0001234d.bin
0cdc855a51d0f71144243de4619d63c72759975c3534080208bc8905dd82c44e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1234D 10680 bytes