Malicious PDF — malware analysis report

Static analysis result for SHA-256 17dfa28ac0d6a1f4…

MALICIOUS

PDF

68.5 KB Created: 2021-03-04 12:07:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f66dadb982bab5f91d7c30fa805a6696 SHA-1: 88d981868024f0daad0db80b5048c2c8268eef67 SHA-256: 17dfa28ac0d6a1f4d4c32ff487bacdf8d638df053c5efdf22cbfa8f29d9e0891
244 Risk Score

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
  • 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.
  • 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.
  • 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://dafemum.ru/award?keyword=troy+bilt+tb22ec+parts+manual In PDF document text
    • http://pedaxofanor.mywebcommunity.org/dark_blue_velvet_jacket_mens.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/ijc8ica/jiborigagedejoxukogef.pdfIn PDF document text
    • https://cdn.sqhk.co/nujorazaje/jeDicha/batatupikefiki.pdfIn PDF document text
    • https://wufisosudima.weebly.com/uploads/1/3/0/8/130874090/23722c989a6d42.pdfIn PDF document text
    • https://cdn.sqhk.co/tabewinudeka/shhibHB/tubezezebukudifujixer.pdfIn PDF document text
    • https://tivufotevomok.weebly.com/uploads/1/3/2/6/132682035/87efc8.pdfIn PDF document text
    • https://cdn.sqhk.co/topazawu/aaghxVQ/gonewesabebimafub.pdfIn PDF document text
    • https://cdn.sqhk.co/gusijigi/fjinpih/62081214340.pdfIn PDF document text
    • https://marejipafikelor.weebly.com/uploads/1/3/1/4/131437604/walejanilu-tabakivo-rojexexewotaki.pdfIn PDF document text
    • https://mijevofere.weebly.com/uploads/1/3/1/6/131606011/letaravajabew.pdfIn PDF document text
    • http://thiswaytovogue.com/small_group_guided_tours_japanfq28p.pdfIn PDF document text
    • http://kinorio5.xyz/pci_syllabus_b._pharmacy_2018-_19jxd9m.pdfIn PDF document text
    • http://goodsfor.life/moxiwmxesr.pdfIn PDF document text
    • http://replyua.site/75957719735d77rm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kesolimasakifi.myartsonline.com/5872922934.pdfIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/resikexifodilobij.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_off0000c93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93C 5404 bytes
SHA-256: 8b7f35c1c5b4fa5c59a2503be0248cdddfc48bc935dd91748afc16615f785736
font_01_sfnt_off0000db8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8A 12900 bytes
SHA-256: 50484cef71094803babf783eb8ee774eaacf3321eb337a3fee1d739bfc99628c

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