Malicious PDF — malware analysis report

Static analysis result for SHA-256 eacdede4db038694…

MALICIOUS

PDF

74.5 KB Created: 2021-05-28 08:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 61cae3b87db7aa4fa53fe146b91cd987 SHA-1: 720c961e3e1b988bdde4a4bf309a1608a52f0d9a SHA-256: eacdede4db03869467c0c2f929b55cb7fa8d415b833f553351814fb8053b5456
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URLs are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://bologen.ru/strik?utm_term=how+to+get+the+latest+instagram+filters PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460723/normal_600f165bd2855.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472491/normal_605f914d487f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481839/normal_6028810da44f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387567/normal_5ff09a3571188.pdfIn PDF document text
    • https://sudivepa.weebly.com/uploads/1/3/5/3/135315425/9610176.pdfIn PDF document text
    • https://xulijuba.weebly.com/uploads/1/3/1/1/131164032/zosimuvidikux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407084/normal_605fb18f6e1d1.pdfIn PDF document text
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/koguzalipar-pijekomup-wadogerisozef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527902/normal_60560ce91895a.pdfIn PDF document text
    • https://gosupafitowiru.weebly.com/uploads/1/3/4/6/134673249/solunebem_peligemasetet.pdfIn PDF document text
    • https://vimosetadasosus.weebly.com/uploads/1/3/2/7/132740377/1877035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424361/normal_6039123673425.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_606821db17b3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490547/normal_5fce7c44615a1.pdfIn PDF document text
    • https://watixure.weebly.com/uploads/1/3/5/9/135991760/dogopojajujeg.pdfIn PDF document text
    • https://dufibivi.weebly.com/uploads/1/3/5/3/135346242/ludapamazizov-tevisoxi-futukegesujibuv-nitarijal.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/1ef4bed8-27ce-42ee-9a07-642bb3066dc8/pakuzekutetudatizutazara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc0b853-6501-4208-ab0b-15e68e6e420d/18444256671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b04efcc1-4857-46c4-b50e-7fac2123c728/54972416002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04267561-7a36-4cf9-a14a-c46c5661a0db/the_lying_game_season_2_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52323826-67e1-4abc-949a-3e0b79fc4fd4/league_of_legends_patch_time_euw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0dec66e-1dec-4c70-95e2-ee895a2bb5c9/why_wont_my_pressure_cooker_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51e9805d-b14d-4ca0-9bfd-fb70ee547084/pubilosozusijipanuxexi.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_off0000e5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E3 5232 bytes
SHA-256: c1fa7a536df8c7f0f8022e78b0c59f5964c5c1da6eecbd848f7f358030821dfd
font_01_sfnt_off0000f79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79A 10732 bytes
SHA-256: 4b48b9835ffa0b9660b609fcb53128c0933ee536392cbabe02c9c76c25d2f682