Malicious PDF — malware analysis report

Static analysis result for SHA-256 f63fa430f327d3e6…

MALICIOUS

PDF

67.8 KB Created: 2021-03-29 21:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 763da3053abd4d10c2de230d9c6b8f48 SHA-1: 333fd19ce904b5b37914e04cb9c899dec9edb624 SHA-256: f63fa430f327d3e6b6877266e4fbbd71a94b495cb35943d4a82e137fbc493af7
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs, many of which point to disposable hosting and are structured as link farms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious content. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/wix?keyword=business+intelligence+development+studio+2008+r2+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388614/normal_6015ad6214a44.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/autorretrato_definicion.pdfIn PDF document text
    • http://neridipazaf.22web.org/zepok.pdfIn PDF document text
    • https://jewigilimeb.weebly.com/uploads/1/3/1/4/131408849/13c8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383928/normal_5fde70fb2341e.pdfIn PDF document text
    • https://muwunijika.weebly.com/uploads/1/3/1/3/131398004/dekivefagari_nogorakajira.pdfIn PDF document text
    • https://tolejavufagus.weebly.com/uploads/1/3/1/4/131437822/rawatar.pdfIn PDF document text
    • http://tebafurunaxinuj.getenjoyment.net/delhi_bus_numbers_and_routes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455399/normal_5fc9a73b47f57.pdfIn PDF document text
    • http://levipek.22web.org/what_is_stack_in_data_structure_definition.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/39447958086.pdfIn PDF document text
    • http://mobutadaxez.medianewsonline.com/44726253629.pdfIn PDF document text
    • https://ronumotesagazuw.weebly.com/uploads/1/3/4/3/134373959/ruwoxujozeporo.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/19a5858f-bb3c-4932-9627-390af2e0130f/audacity_definition_picture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f660296-4dee-4213-a5a7-052822170da9/58884602875.pdfIn PDF document text
    • http://nojikigor.myartsonline.com/44514477980.pdfIn PDF document text
    • http://jawuwibunoropo.atwebpages.com/90690856472.pdfIn PDF document text
    • http://ginobufuluxok.rf.gd/somewhere_over_the_rainbow_iz_lyrics_az.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6acd396-d288-43a8-9d0c-c28f03d671b3/44653663465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1ff4c6-8e33-4e7b-8aa0-0d5da8c0e8f7/tewaviloloxosolosedopewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb8826c1-47ec-4d52-9489-633cbedd39e4/jufesiduxuxoregoxizarites.pdfIn PDF document text
    • http://wojibikifi.myartsonline.com/7839226064.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_off0000c9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D8 6144 bytes
SHA-256: 2c48c5b26e54cc77c8ab82fc562e1eee155d25abaf64668c4104025052b8092c
font_01_sfnt_off0000dec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC6 10168 bytes
SHA-256: 0d41ce68b1a7aec30816b01f70719e46ceea19002005784154d43c926ffe4a9f

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