Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b1ace6f814a739…

MALICIOUS

PDF

72.0 KB Created: 2021-03-03 07:03:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c82e04540171d87b6616f832585bb3de SHA-1: 59804e676407936ecd7958f9d928e012ef8eb347 SHA-256: a8b1ace6f814a739fcccc91afd5782eb83824dd9975780c2fe91b580163ad798
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=the+idiot+movie+2003 PDF link annotation
    • https://tunuwadubozowe.weebly.com/uploads/1/3/4/3/134363043/8211948.pdfIn PDF document text
    • https://fafefojesuvun.weebly.com/uploads/1/3/4/6/134651362/sibiwaniturozovokufu.pdfIn PDF document text
    • http://jenerotisa.mywebcommunity.org/what_are_the_main_characteristics_of_liberalism.pdfIn PDF document text
    • https://cdn.sqhk.co/nunemiziku/DrOibLI/12464423310.pdfIn PDF document text
    • http://siankaanmexico.com/pamigumetaxelewn0r6a.pdfIn PDF document text
    • https://xowuxuwakewobi.weebly.com/uploads/1/3/4/8/134853014/towetiwaxenefitoligo.pdfIn PDF document text
    • https://rogujodur.weebly.com/uploads/1/3/4/8/134899240/borokuwepimego_guxut_wanekevobosut.pdfIn PDF document text
    • https://setopotuvojinow.weebly.com/uploads/1/3/4/8/134877086/a49e8adec33eaf.pdfIn PDF document text
    • https://cdn.sqhk.co/rufadexu/gef5LGA/ragdoll_battle_roblox.pdfIn PDF document text
    • http://opensol.xyz/638112444013ok3j.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/cojjijz/technic_launcher_minecraft_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/winogolelog/cwYhjif/giant_cupcake_bakery_near_me.pdfIn PDF document text
    • https://modibabujoxasa.weebly.com/uploads/1/3/4/6/134694511/ae107504952358.pdfIn PDF document text
    • https://finolija.weebly.com/uploads/1/3/4/6/134625313/c7a6952d.pdfIn PDF document text
    • https://gasezojilatinoj.weebly.com/uploads/1/3/1/4/131455825/2619249.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://noroved.myartsonline.com/law_textbooks_for_sale.pdfIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/newusiredasufexi.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/xufowujadinutalos.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_off0000dd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4C 4996 bytes
SHA-256: 4e4b2f6ea8ce94f2da69bf754becb9146a289999f852a81f93637774b3af707e
font_01_sfnt_off0000ee39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE39 11020 bytes
SHA-256: 82772013fab7f6ea38072d390726a4957ee0a9dedb18bf0028570c57f4bcd2db

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