Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c10f5db94468d4f…

MALICIOUS

PDF

61.4 KB Created: 2020-11-14 03:34:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9414ce006ba054062e964ee67b421bbd SHA-1: 1d1b30d06bf5ea3967791044df4f9fbd499779d6 SHA-256: 4c10f5db94468d4fb5575d35ccfb38fbc63ce17b0df51ad45fe1d4689ef91e12
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a large number of embedded links, many of which point to suspicious or unknown domains, indicating a link farm or phishing attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=molecules+to+moles+worksheet In PDF document text
    • https://gasipepimajut.weebly.com/uploads/1/3/4/3/134367512/5952435.pdfIn PDF document text
    • https://xebivonejawaf.weebly.com/uploads/1/3/4/0/134096192/vifefegotazitalu.pdfIn PDF document text
    • https://subonotewus.weebly.com/uploads/1/3/4/3/134347286/tubizawalok.pdfIn PDF document text
    • https://sotubuponin.weebly.com/uploads/1/3/4/6/134644868/gajusudapajofarusun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f986fd32a44b.pdfIn PDF document text
    • https://bapefakujina.weebly.com/uploads/1/3/4/4/134483882/nidewa.pdfIn PDF document text
    • https://vizoxubo.weebly.com/uploads/1/3/4/7/134703389/didigavowij.pdfIn PDF document text
    • https://lewelekokoje.weebly.com/uploads/1/3/4/3/134333059/nubasaf.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/kodizurapem_fupuz.pdfIn PDF document text
    • https://kizozejibudi.weebly.com/uploads/1/3/4/4/134460324/249556043c.pdfIn PDF document text
    • https://miwunukeje.weebly.com/uploads/1/3/4/5/134524605/vowafopewefo.pdfIn PDF document text
    • https://zopewurexolo.weebly.com/uploads/1/3/4/5/134519391/a66171.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/gumagabu/wetasibonipijobasuwabevos.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/shark_pro_steam_pocket_mop_vs_bissell_powerfresh.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/lake_okeechobee_water_level_history.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/19970376105.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_off0000b751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB751 4992 bytes
SHA-256: 17b065d8369668e3ce024f603ac5ffe016834025de0db77206cbe248bc3012d1
font_01_sfnt_off0000c83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83E 10148 bytes
SHA-256: f1757872d94de8774245938458c009544b8d3ef21497443233095d7ce6daf95e

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