Malicious PDF — malware analysis report

Static analysis result for SHA-256 10b7096b4d4ee40d…

MALICIOUS

PDF

65.1 KB Created: 2021-03-14 09:57:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f4d60674933e3b7ebc5ce24f15c63e5c SHA-1: bd3005b96886d0d3b8fd73504e33d167f8aa5d26 SHA-256: 10b7096b4d4ee40d08ebfaf94fc48c9de5a44780ab83a24ff0372ac0a8532064
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, suggesting a link farm or phishing attempt. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics confirm its malicious nature, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains text related to 'Bosquejos para matrimonios pdf', likely a lure to attract users to the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • 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://nipisod.ru/award?keyword=bosquejos+para+matrimonios+pdf PDF link annotation
    • https://cdn.sqhk.co/baluwofuk/GGzhgLc/to_do_list_app_iphone_android.pdfIn PDF document text
    • https://cdn.sqhk.co/turaxulefa/he2jfjd/62779346661.pdfIn PDF document text
    • https://cdn.sqhk.co/woledibiroju/uoiemjj/pixusolufun.pdfIn PDF document text
    • https://cdn.sqhk.co/baxijaxazixi/srLheIb/galaxy_s8_ringtones_for_contacts.pdfIn PDF document text
    • https://cdn.sqhk.co/supuzeren/IetR2ha/sabewik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370087/normal_602608078ad9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485821/normal_6029dfdfead6d.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/1iegdk9/vikings_war_of_clans_fast_influence.pdfIn PDF document text
    • https://kixorixoti.weebly.com/uploads/1/3/0/7/130740187/f9f1bbd9eb4.pdfIn PDF document text
    • https://cdn.sqhk.co/kubasovusi/R7jjjbk/carpenter_wood_cutting_tools.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473890/normal_5fd6e0728b117.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408993/normal_5fe5eb8e04f71.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/i2mP2hj/zombie_fun_run_near_me.pdfIn PDF document text
    • https://rofixuninapo.weebly.com/uploads/1/3/5/3/135313709/furomuzilevitugad.pdfIn PDF document text
    • https://tixovokibena.weebly.com/uploads/1/3/4/1/134109053/todeti.pdfIn PDF document text
    • https://cdn.sqhk.co/savimatuv/rhcihje/zetiledaxiwewu.pdfIn PDF document text
    • https://cdn.sqhk.co/nitunoda/hfbqjf8/cracky_egg_easter_games.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dazawojob/vermont_castings_intrepid_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/93026269086.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC30 5404 bytes
SHA-256: d2e07cf7e5d26c233873eb5186109a7a8af5022aec14943543a9c311a147ab75