Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4467fe02b172bc6…

MALICIOUS

PDF

68.1 KB Created: 2021-05-15 12:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b6d1e89a7f55154e38a134d41e4094fd SHA-1: 362e6deedd11f665d5e0f70b9dae2692c51dab22 SHA-256: b4467fe02b172bc62149c10224a8e02da9d07cd26d1eebccea45cbcf52cfb12f
186 Risk Score

Malware Insights

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

The PDF contains numerous embedded links to external websites, a common tactic for SEO link farms or phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious or scam-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=asu+poly+map+pdf PDF link annotation
    • http://kernig.store/how_do_sbir_grants_work904be.pdfIn PDF document text
    • http://wildber.store/15775957599e6x91.pdfIn PDF document text
    • https://cdn.sqhk.co/veladaxuzeba/jgDhceb/fluke_805_vibration_meter_rtc_coin_cell.pdfIn PDF document text
    • https://cdn.sqhk.co/levuzivanu/XhgOjjD/ascaridia_galli_life_cycle.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413986/normal_5fd628faf2c89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494149/normal_5ff713927b41b.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/iibhh4f/dewukikajarajapebakonazix.pdfIn PDF document text
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/zodikif_likatonowosivuj.pdfIn PDF document text
    • https://movojedafep.weebly.com/uploads/1/3/0/8/130814843/883e1cad3.pdfIn PDF document text
    • https://cdn.sqhk.co/mizipudi/cRjlnjf/82359854299.pdfIn PDF document text
    • https://budasanufewe.weebly.com/uploads/1/3/5/3/135323580/ruretenewebab_kiwutusa.pdfIn PDF document text
    • https://cdn.sqhk.co/fabokofe/L9idig7/epic_empires_2019_fotos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498971/normal_606349553852f.pdfIn PDF document text
    • https://mizojomi.weebly.com/uploads/1/3/0/9/130969452/4280682.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/nijudow/paxekurezibi.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/tabla_periodica_de_los_elementos_mas_representativos.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_off0000cbdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDD 5184 bytes
SHA-256: 7424cea262ceb48152b8f5ecb294d42e6e01aabfa38d3f84822b3138d544b7e0
font_01_sfnt_off0000dd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7F 10804 bytes
SHA-256: f6d3987cc2d7d02c907057490aa62453bec27e542968d811060cdc248b54716a

Open this report in the interactive analyzer, or submit your own file for analysis.