Malicious PDF — malware analysis report

Static analysis result for SHA-256 8198625ce0b69c10…

MALICIOUS

PDF

71.6 KB Created: 2021-05-05 11:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3f67c9ee12ba0562df17e693738803c6 SHA-1: 9861270d872b46637ece947e00e6e10648c47e43 SHA-256: 8198625ce0b69c10dcc0f417cac3aed33a4784fb9f31141ab21888287198deb9
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7780

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/strik?utm_term=ps+vita+pch+2001+vs+2000 PDF link annotation
    • http://yazansoft.com/rezidezifofabagitvmivh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421939/normal_6050bb3f2056b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_603301b3608db.pdfIn PDF document text
    • http://infokurs.design/jquery_animate_transform_matrixy49cx.pdfIn PDF document text
    • http://rusakova.space/ted_lasso_theme_song_title6yj3i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469641/normal_60189f19c7644.pdfIn PDF document text
    • http://bekowakiged.iblogger.org/13013818230.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448550/normal_605495661d7aa.pdfIn PDF document text
    • http://hytri.com/lazatosigurokol90hn7.pdfIn PDF document text
    • http://datingdate.site/37204880447gtc3o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411717/normal_60106a9b7db5e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_36a4193cb08244acb48a30ef81760531.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cd7531c-8e27-4770-8bf1-455b9ccc55fb/how_do_you_find_the_primary_and_secondary_voltage_of_a_transformer.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/election_commission_kerala_form_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6b4c6c1-aa8d-40b5-88bc-210d0f646122/arris_nvg589_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a73f4f8-17fc-4d19-b89e-ad51ba069956/41008426751.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/zizoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf8c1f00-0a0f-488a-8be9-f06756a48758/cat_forklift_error_codes.pdfIn PDF document text
    • https://2a04f01a-7147-4793-98aa-b59dc93e6f96.filesusr.com/ugd/efcdeb_f3c60080214c4f1d9e382e7c847024a7.pdf?index=trueIn PDF document text
    • http://pixagikaw.epizy.com/countable_and_uncountable_nouns_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/fowobaferuwin.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/19488962334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c4f3c61-b263-437b-bf3f-8e3e549a4650/43633908246.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000feb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB0 5280 bytes
SHA-256: 2baa71078bf2fad87d261cd5a172b69eff661385a7de6ea69d3daa796e7e58aa
font_01_sfnt_off000110af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AF 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0