Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bbdb8ac5e0a4ae8…

MALICIOUS

PDF

83.6 KB Created: 2021-03-05 15:48:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bda497693c57c200e6512d309bd5682f SHA-1: a783ecd5e457415796e7b43275c5aab1513c178d SHA-256: 9bbdb8ac5e0a4ae82b4244738460463c2fc5fdaa3db3785acc47f7cb64dad384
96 Risk Score

Malware Insights

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

The sample was detected as malicious by both a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of an embedded URL pointing to 'mezovuduw.ru' suggests a phishing or redirection attempt. Although no scripts were explicitly extracted, the PDF format often utilizes JavaScript for malicious actions, hence the inclusion of T1059.007.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9458

Heuristics 4

  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://mezovuduw.ru/aws?utm_term=what+is+christian+prayer+beads
    • http://monstergym.ru/recurrent_genital_herpes_guidelinesqzicr.pdf
    • http://samyog.ru/8806293147stthk.pdf
    • https://cdn.sqhk.co/tixuniwe/618jchc/social_media_strategy_proposal_template.pdf
    • https://static.s123-cdn-static.com/uploads/4387577/normal_6006519dc94ee.pdf
    • https://cdn.sqhk.co/bitaxukezor/gNiajad/best_wedding_cake_designs_2019.pdf
    • http://help-feedback-amzn6.xyz/xbox_one_gaming_chair_with_steering_wheelnhm2a.pdf
    • http://astrology-personal.online/42876361172kybjf.pdf
    • http://begemotiks.fun/tagadikbor80.pdf
    • https://cdn-cms.f-static.net/uploads/4417319/normal_602fe3bf85002.pdf
    • https://static.s123-cdn-static.com/uploads/4446399/normal_5ff5211cdd5e2.pdf
    • http://cabinetsapp.xyz/muzukuperidudoverasiwenzb4c0.pdf
    • https://cdn-cms.f-static.net/uploads/4377120/normal_6016024b946fd.pdf
    • https://cdn.sqhk.co/baruduwege/ijfifgj/gold_rush_3d_no_ads_apk.pdf
    • https://cdn.sqhk.co/dewavasese/fHq6jjC/wotogimoxuwefiwubasaxa.pdf
    • https://cdn.sqhk.co/jilijibimi/jfvmbLy/1st_grade_activities_on_zoom.pdf
    • http://ketrovk.xyz/mepelevox1m3vt.pdf
    • http://copyright-rules-help.com/what_does_unity_in_art_meanbxxkr.pdf
    • https://cdn.sqhk.co/foropogajag/gdlQwgf/color_balloons_dream_meaning.pdf
    • http://muzoc.xyz/mitashi_washing_machine_manual6fhd2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gafedupeba/48062424905.pdf
    • https://s3.amazonaws.com/fasudikek/88576056059.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011418.bin
4846103602bfe2b5c1cb17470e2372aade9eecebda4e00fde6e67a3ec6233a0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11418 5384 bytes
font_01_sfnt_off0001266d.bin
0c4a1a631b5edf0bd8a950084914b3485273b40fce602b498f3312c7a46dd102		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1266D 11604 bytes

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