Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd1bc38bfeaf181…

MALICIOUS

PDF

69.8 KB Created: 2021-02-11 04:11:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 4160d0f6da8faafd4407b0c5a2bf1236 SHA-1: 11bca17df15c4895016907b3648c5f15a9a99ba0 SHA-256: bdd1bc38bfeaf1812e245ce5f9ef86eaedf781c28679c8213f034823dd672117
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically referencing 'sony+walkman+mp3', suggesting a lure for a product scam or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://jottigo.ru/123?utm_term=sony+walkman+mp3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427526/normal_60111ca480d6a.pdfIn PDF document text
    • https://nidabiweni.weebly.com/uploads/1/3/4/8/134865500/fefanizerekumetuber.pdfIn PDF document text
    • http://kihepc.xyz/974969366440y5ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459805/normal_5fd82d099eafa.pdfIn PDF document text
    • http://semowatuk.iblogger.org/ferry_meadows_fishing_reports.pdfIn PDF document text
    • http://arm-watch1.club/58305334053dbal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471273/normal_601e807778884.pdfIn PDF document text
    • http://all-system7.club/mitaferasabunofinejimamajaqg9j.pdfIn PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/ziduwuk.pdfIn PDF document text
    • https://tumafikajenama.weebly.com/uploads/1/3/5/3/135326798/bazinabaget.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457279/normal_5ff28bf0bda61.pdfIn PDF document text
    • http://agent-ritual495.online/xajizurudesumugnvhiq.pdfIn PDF document text
    • http://geosen.net/la_ley_y_el_orden_capitulos_completoftf0n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380692/normal_5ff7a569d3c08.pdfIn PDF document text
    • http://reduslim-eu.site/74670462899vnpp8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474977/normal_600f1394e3cb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369768/normal_5fd077c9ee79f.pdfIn PDF document text
    • http://helplnstagramoffice.com/85072153586gop1t.pdfIn PDF document text
    • https://zezojafoxivofed.weebly.com/uploads/1/3/4/5/134528913/pijoxubib_nozojilawaxinuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nokakegobowu.epizy.com/itep_official_score_report.pdfIn PDF document text
    • http://jatirud.rf.gd/13636204332.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_off0000d3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AA 5216 bytes
SHA-256: b75ccf1dfb4128be92df8eccad4b9d978fe6bb60b8dd26483e0a7022a950b591
font_01_sfnt_off0000e57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57E 10404 bytes
SHA-256: 39b22f534089e4ef41127fb66bd7aaa5e72fb02723d7dccac22574814866b8b1

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