Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffc306201ca52118…

MALICIOUS

PDF

81.9 KB Created: 2021-05-15 20:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: daf5eb83ae1afb3407bf7f895d2c5337 SHA-1: 4aa4e15a7b56e8a116a61cb6f3b76993f4711fac SHA-256: ffc306201ca521186bc6fb6ffdf860a5c1157851361f64055685a537d8c08a79
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to creating online birthday cards, which is a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/strik?utm_term=make+a+free+birthday+card+online+and+print
    • http://rojibitakuvekuw.scienceontheweb.net/58462585477.pdf
    • http://bnl-jobs.com/exerpeutic_900xl_recumbent_exercise_bike8v6em.pdf
    • http://azakalaza3.xyz/342592879108kvn1.pdf
    • http://tifusavegapawuf.mygamesonline.org/genatuvuteveforepivo.pdf
    • https://cdn-cms.f-static.net/uploads/4372753/normal_6046458b41654.pdf
    • http://kino-vezde.ru/mcp61pm-hm_rev_2.2_biospn1gs.pdf
    • http://select-get.top/50247255693tbj4v.pdf
    • https://cdn-cms.f-static.net/uploads/4418583/normal_601b426745ca3.pdf
    • http://gmetry.online/18568051118etm9q.pdf
    • http://santaparker.store/27754068918r1gfk.pdf
    • https://cdn-cms.f-static.net/uploads/4462678/normal_603ce951b85b5.pdf
    • http://mists.space/julobexebawowenozezagasekrkfc0.pdf
    • http://sirunome.mypressonline.com/13364856284.pdf
    • http://jeseselanus.scienceontheweb.net/how_to_top_up_transmission_fluid_vt_commodore.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vavale/application_form_spouse_visa_japan.pdf
    • http://buzumigasox.myartsonline.com/tabir.pdf
    • https://s3.amazonaws.com/dukavunivifa/zijepulekukurelilelede.pdf
    • https://s3.amazonaws.com/dinigugaxej/patufogodejoxijagizisifu.pdf
    • http://mojogoralil.onlinewebshop.net/69560402114.pdf
    • https://s3.amazonaws.com/suzixegazunow/4044540526.pdf
    • http://rosajeku.myartsonline.com/boards_and_beyond_step_1_checklist.pdf
    • https://s3.amazonaws.com/vuliwisuwig/how_to_read_a_velocity_graph_calculus.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_off000101c9.bin
a5bedf9dca0b5b15e78c8f68eadc4ea6a0154081df1e6f66d094a39916694d2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x101C9 5376 bytes
font_01_sfnt_off00011423.bin
de01e4e35ee9699e2e3d861b0ab321496ecc9ca3df6287f2b9ba3af31764a738
pdf-font-stream PDF embedded font (sfnt) at offset 0x11423 11180 bytes