Malicious PDF — malware analysis report

Static analysis result for SHA-256 d492e01d476aff34…

MALICIOUS

PDF

73.1 KB Created: 2021-03-31 14:37:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3505de6fe3746a53b60d71eecbafa440 SHA-1: 8ce2961d3667a8586b044b85a044cfffda734503 SHA-256: d492e01d476aff34cadf646b6f3a2db2ac22f4cd65b50791c7d4ed2bb5b6523c
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://ponafet.ru/wix?keyword=blackweb+party+speaker+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367921/normal_602a3fb444453.pdfIn PDF document text
    • https://cdn.sqhk.co/ketusugedi/LvjhggB/memixagudedosiligok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450347/normal_60251fd5a1262.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/21975598173.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/cif4ple/xopupu.pdfIn PDF document text
    • https://xikoroto.weebly.com/uploads/1/3/4/3/134338579/dfdb894d88129f.pdfIn PDF document text
    • https://jozufibajas.weebly.com/uploads/1/3/0/9/130969385/3371553.pdfIn PDF document text
    • https://cdn.sqhk.co/wanoposuj/iaIUjgA/the_legacy_golf_club_resort.pdfIn PDF document text
    • https://moxuvobojivoz.weebly.com/uploads/1/3/0/8/130873852/3068697.pdfIn PDF document text
    • https://pibiwija.weebly.com/uploads/1/3/4/8/134896476/e3978e8.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzifixe/biDhgih/92761882612.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/8c3d921b-f774-4f89-9100-9ce58ae25e33/78596756784.pdfIn PDF document text
    • http://gemovimuwopete.atwebpages.com/halo_books_in_order_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/088789e0-ddd8-4749-8ee7-5ae58095fa24/97192787437.pdfIn PDF document text
    • http://suwuriru.onlinewebshop.net/43391445250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e8e30a0-bd5f-4933-b0e3-414d9455b8bf/nujapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca4ba8ef-aad4-4136-840c-03f7df373535/the_secret_of_underground_medicine_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00e0929f-9560-4d07-9ad7-af677a29f5d0/how_to_replace_a_lost_state_id_in_ohio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e70f329-4f8e-47ee-adae-a261804049f9/97025048798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/745fd0e9-5383-41c9-90c4-c9f1082006f3/fender_passport_250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4904206-0ed9-41fb-a04f-16c542460131/jororavamofabosunanid.pdfIn PDF document text
    • http://kaloruligot.onlinewebshop.net/84074543164.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_off0000e023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE023 5376 bytes
SHA-256: db1fc48ddb7ac248f03a80a81ebca556d654968338d7e0dfade82e26a6b9c8d8
font_01_sfnt_off0000f295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF295 10580 bytes
SHA-256: 86422623887fa2114c4e05f37f7320a41acc2e0a9fa794205cd3c5c82303b58f

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