Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d00871a2e17d18…

MALICIOUS

PDF

80.2 KB Created: 2021-05-08 06:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 93584123bab865746245df12fb459054 SHA-1: 53b8b787efb960f2e3b8c4d2dc2632c0cb6c4ca4 SHA-256: 47d00871a2e17d18e3d67d8a3075116a54ecec51ab739c19127438d77d406105
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://maypoin.ru/strik?utm_term=2001+lexus+es300+engine+for+sale PDF link annotation
    • http://faponabon.mygamesonline.org/business_english_course_book_market_leader.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/how_to_reset_prius_maintenance.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_604e76eff314b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_601539116b170.pdfIn PDF document text
    • http://jijomaj.getenjoyment.net/what_is_lan_man_wan_with_diagram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393193/normal_602fde3fec18d.pdfIn PDF document text
    • https://mokasinerosun.weebly.com/uploads/1/3/2/6/132682676/panafugawedozir_fevepazibusewi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426551/normal_5fce4e0ee85ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452612/normal_606761b4290de.pdfIn PDF document text
    • https://mupexopuwes.weebly.com/uploads/1/3/4/7/134722910/ab390d9a4.pdfIn PDF document text
    • http://sigixexizo.sportsontheweb.net/26372727049.pdfIn PDF document text
    • https://sajamokof.weebly.com/uploads/1/3/4/5/134599006/gakaburadoka-mutoj.pdfIn PDF document text
    • http://pedaxofanor.mywebcommunity.org/task_centered_approach_in_social_work.pdfIn PDF document text
    • http://lilozekakotelup.sportsontheweb.net/jozeraledupugot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402707/normal_605fd7be416b6.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/e7bdfe48-428d-4e7e-9846-e8417c4d952a/68569272212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/280f782a-a4d1-47b0-9a98-a388d7bbfef7/julemip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/531849e2-2733-47a3-b4eb-80c14d8c274b/samsung_55_inch_tv_vesa_size.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_off0000fbc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC2 5400 bytes
SHA-256: 35d32929eceedefc55a0398ab33d737626a9e13b6186cb5a987a8b9836a7c452
font_01_sfnt_off00010e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E35 10900 bytes
SHA-256: 3ef7add7ce323a8b46f5ee57626ac32ea78efcc7d54551cd298ec98b2a1241e2

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