Malicious PDF — malware analysis report

Static analysis result for SHA-256 47a407a0fa4ed897…

MALICIOUS

PDF

91.0 KB Created: 2021-03-24 12:03:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ee7d12165343a2f7a557bfd7c690a640 SHA-1: f4fee3996b5dc78ff6bb0e6431386c6dfd1a5ae5 SHA-256: 47a407a0fa4ed897ed6c75021062b0b1caa32b3c095ddfadc04abf1933911b3b
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to redirect users to potentially harmful websites. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a phishing or SEO manipulation scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/wix?keyword=36+inch+tv+wall+mount PDF link annotation
    • https://cdn.sqhk.co/libobivole/sgfghji/major_league_rugby_2021_season.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugituxi/gcXiege/amc_rent_a_theater_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/geruxibab/jjhhfif/myair_sleep_score.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxudofexal/f3DiGif/kowedulo.pdfIn PDF document text
    • https://rujuzodojavumip.weebly.com/uploads/1/3/4/7/134726220/c8242.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/jdqfhil/diep._io_best_tanks_2020.pdfIn PDF document text
    • http://kushtanash.ru/mutant_message_down_under5wmnm.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/gYf7BxL/binoxuvivujaruditikoxe.pdfIn PDF document text
    • https://xafokevixutevib.weebly.com/uploads/1/3/2/6/132681308/luzajipaxerud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391921/normal_60546f61a41a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417040/normal_5fee664baa229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450355/normal_5fe76921298f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410217/normal_604a3bdf4e2da.pdfIn PDF document text
    • https://jolewewovu.weebly.com/uploads/1/3/6/0/136087062/rilisariw.pdfIn PDF document text
    • https://cdn.sqhk.co/xajevedu/hgfRxe6/monster_energy_race_today.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393026/normal_60585e02213ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372072/normal_5fe6b444aaccb.pdfIn PDF document text
    • http://montana-media.com/smart_hrm_bracelet_not_turning_onx7n69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460706/normal_60001bc37f794.pdfIn PDF document text
    • http://raisinshub.club/totagenefuruwumutph90g.pdfIn PDF document text
    • https://rinulokol.weebly.com/uploads/1/3/4/8/134868038/7321035.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422645/normal_5fe2e6b1024dc.pdfIn PDF document text
    • https://jofomozali.weebly.com/uploads/1/3/5/3/135387403/3679bb771f5d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000124fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124FE 5140 bytes
SHA-256: 98704cbaba07a0b6908c707de5876751dda730c187fd2409e453af2b643b79a4
font_01_sfnt_off0001366e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1366E 11504 bytes
SHA-256: 0a4327c6d3ba575010dba98a0051f3cdddfb0cecfc3929268328577ff929ae9f