Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc30737101320e1e…

MALICIOUS

PDF

60.3 KB Created: 2020-12-07 13:55:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9ac69faeabeca43344111fc92fec09d1 SHA-1: 148415ac7cd2209764bec158df78308718dea53e SHA-256: cc30737101320e1e16dc49925cfaa7f731b3b3caf5231322e20b5c25061f0180
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment 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 0.9996

Heuristics 6

  • 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.
  • 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
  • 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://trafficel.ru/123?utm_term=vampire+royal+armor+mod PDF link annotation
    • https://ziwuwozapa.weebly.com/uploads/1/3/4/5/134517717/6334d451e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470385/normal_5fb2554447cd6.pdfIn PDF document text
    • https://javemutamutog.weebly.com/uploads/1/3/4/6/134638327/jijodosofotinuredo.pdfIn PDF document text
    • https://wafugavewe.weebly.com/uploads/1/3/4/3/134369352/jemavamejogu_sesoda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391921/normal_5fc20ca8d1a3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417325/normal_5f9a264a9d330.pdfIn PDF document text
    • https://karegito.weebly.com/uploads/1/3/4/6/134626514/vizagiredoramuf_fezivafaja_pivudi.pdfIn PDF document text
    • https://vegivuben.weebly.com/uploads/1/3/4/6/134660922/povovag_tajabuniworozo_gidemep_vurimizuzi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383688/normal_5f8cece9ec3ba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeed2560-b400-4160-b4f3-14e1ce351b67/download_zombie_gunship_survival_mod_apk_v1.5.0_unlimited_money.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/jatagikopuwulam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a08428d-bab2-4b93-8e56-a914af93be33/budivajem.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/98711464434.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000b05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB05B 4992 bytes
SHA-256: b923c80b09b6850286d046b829f7b515aabeb1c72f0a56ef263e18510fa9ea73
font_01_sfnt_off0000c147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC147 10336 bytes
SHA-256: 024db49cc7f0933f6c0b7bf7294c4be100d7be136d9125f1dc101b2b11a369c9