Malicious PDF — malware analysis report

Static analysis result for SHA-256 974c80d44cd140e5…

MALICIOUS

PDF

74.2 KB Created: 2021-04-16 17:12:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 08d055aeec1070db3f8bfb315e2455e7 SHA-1: 111aca35a275659d94f8d89da6f97626d3526f8e SHA-256: 974c80d44cd140e59283fa8495eb8d3b7123601682d22c81b17d8f0bdb981866
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=what+does+a+game+warden+do PDF link annotation
    • https://zeloseko.weebly.com/uploads/1/3/1/1/131163733/769086bb8de277.pdfIn PDF document text
    • https://fedonofawok.weebly.com/uploads/1/3/4/8/134881994/12b9b14f768b.pdfIn PDF document text
    • https://cdn.sqhk.co/zevivovakok/igjaJq9/four_guardians_megaman.pdfIn PDF document text
    • https://cdn.sqhk.co/dixobiwi/5jgQAii/gtr_wallpaper_iphone_xr.pdfIn PDF document text
    • https://kusotabemeradu.weebly.com/uploads/1/3/4/8/134873971/a34343.pdfIn PDF document text
    • https://nopiwevupemaro.weebly.com/uploads/1/3/4/6/134653234/4410641.pdfIn PDF document text
    • https://cdn.sqhk.co/pibusupi/Agiv9h5/party_music_2020_rap.pdfIn PDF document text
    • https://nugukofijopi.weebly.com/uploads/1/3/2/7/132712180/nalelawirige.pdfIn PDF document text
    • https://zagiwesojuju.weebly.com/uploads/1/3/2/7/132712322/viweteb-pimugoja-fivediviwesoxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369514/normal_5fe7f10e1701c.pdfIn PDF document text
    • https://sobolone.weebly.com/uploads/1/3/0/7/130775045/feseb_fazamubiwejeb.pdfIn PDF document text
    • https://xagigerabep.weebly.com/uploads/1/3/1/4/131483632/6545970.pdfIn PDF document text
    • https://danizejoj.weebly.com/uploads/1/3/5/9/135990884/xevurevi_liloxulawotak_dujofazenegubo.pdfIn PDF document text
    • https://cdn.sqhk.co/wizevomorofe/gjfILLh/jonulekawukonu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367916/normal_600193bf842cd.pdfIn PDF document text
    • https://judetali.weebly.com/uploads/1/3/4/7/134723341/pexunerij-lofaze-sodozugajezen.pdfIn PDF document text
    • https://cdn.sqhk.co/dexediwiboze/eggRXt8/contour_next_ez_meter_test_strips.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/ce43be0d-b95c-4313-ac35-5f51934d3799/fimunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c78c4a6c-0e6f-44ac-b857-de3f9d13933d/starting_out_with_visual_c_4th_edition_by_tony_gaddis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8e804e-9377-4fb5-b022-2b18a6e00f8b/66699708941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/775ba4f4-358e-462d-afc4-822b2d0101e8/91602801494.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_off0000e56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56C 5312 bytes
SHA-256: 527aa367e827bbb9c725e40cbd8aba86269efe08063982a3b0d7248f798036ab
font_01_sfnt_off0000f76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76B 10512 bytes
SHA-256: 149153fd7727615d3adfeb0d24df7534ec4eba05712bf8b7a92961fb4d7bc56e

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