Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd2371346c13b99…

MALICIOUS

PDF

68.1 KB Created: 2021-03-29 02:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c0e16e199aa4414102e65ed508f6f6c SHA-1: 18fcc1cd0d5b9c6f7a2a3bd7b261bc1291f53e0e SHA-256: bbd2371346c13b997a61b8962f7845a25a82c498fa8db9586452398df095cfb2
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, flagged as a link farm, suggesting a phishing or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads. No scripts were extracted, but the presence of external links and the high detection scores point towards a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9830

Heuristics 4

  • 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
  • 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://lozipotod.ru/award?keyword=advanced+excel+formulas+functions+pdf
    • https://tutupofu.weebly.com/uploads/1/3/0/9/130968911/7bd7c6c11c2ba.pdf
    • https://static.s123-cdn-static.com/uploads/4470405/normal_60087a4786a36.pdf
    • https://cdn.sqhk.co/ponesigis/jarJgjL/69743905710.pdf
    • https://xuwejemeluk.weebly.com/uploads/1/3/4/3/134314543/zijakazig.pdf
    • https://cdn.sqhk.co/visobipibe/gYsvNdw/border_guard_requirements_canada.pdf
    • https://sisivijujejaliw.weebly.com/uploads/1/3/2/7/132741673/8780417.pdf
    • https://jukatuve.weebly.com/uploads/1/3/2/7/132741058/timogogojezefeve.pdf
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/e0023.pdf
    • https://cdn.sqhk.co/bikegola/T6ehg8U/27462824204.pdf
    • https://xuposebifaperep.weebly.com/uploads/1/3/4/6/134673232/zafewetekavixavugoj.pdf
    • https://cdn.sqhk.co/xuwolupenilu/aJjezPn/iphone_4_cydia_apps_free.pdf
    • https://cdn.sqhk.co/kosadara/fij045Z/prehistoric_shark_game.pdf
    • https://cdn-cms.f-static.net/uploads/4374978/normal_601ad71c6d2a2.pdf
    • https://kawolusasemosu.weebly.com/uploads/1/3/5/3/135397741/juxozoresovujuxepet.pdf
    • https://cdn-cms.f-static.net/uploads/4419451/normal_5fe7e3ba40d9f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b6086c54-8ef4-40f3-ba18-bbbb993b339e.filesusr.com/ugd/36e927_37b31707c2f8408880b59130abc97501.pdf?index=true
    • https://s3.amazonaws.com/sepovutapakogaf/biredoxumikimod.pdf
    • https://6b54b0b2-91db-43cc-88c8-bbc4f7e20b37.filesusr.com/ugd/a773aa_a795c2fcabcf48d5a2b09922a319479a.pdf?index=true
    • https://9f5bcc56-a059-4f00-ae85-604acd6a3d2d.filesusr.com/ugd/ac9354_27848a41dfc946a9b4b34a5a0524932d.pdf?index=true
    • https://s3.amazonaws.com/vinejivunitego/ecology_unit_review_worksheet.pdf
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_af5b1945a83c41a28722e183adc0c6c5.pdf?index=true
    • https://5637a596-61ce-4e67-8953-8fd9cb84b940.filesusr.com/ugd/c20ea7_b6505f3aba0e4699ab71f49533ef560c.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df30.bin
9d039d927ddb0479a5130a55fa307a90fab4e81eb63a8a1e3483b7143a9ecc48
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF30 5416 bytes