Malicious PDF — malware analysis report

Static analysis result for SHA-256 761f904b70cedd26…

MALICIOUS

PDF

82.2 KB Created: 2021-03-19 09:09:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 965cf5ebd0583f5e6e30c6c780a1312a SHA-1: d89cf6f93cb0b39134a3633a0a618d5111b57aa5 SHA-256: 761f904b70cedd26efb04f47e37dceaa98ae2debb4342df08dee46a2ada2959f
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The ML classifier strongly indicated maliciousness, and the PDF contains numerous embedded URLs pointing to potentially malicious domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate attempt to obscure the true destination or distribute multiple payloads. No scripts were extracted, but the presence of many external links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://zajinet.ru/strik?utm_term=how+to+measure+cigar+gauge PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427300/normal_6019ac803da57.pdfIn PDF document text
    • http://azakalaza5.xyz/red_harvester_ant_bite_symptomslysgh.pdfIn PDF document text
    • http://mmuuue.space/2703512771fnwbj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490371/normal_5ffc2e7eb76bf.pdfIn PDF document text
    • https://cdn.sqhk.co/zazerejaxu/icwFLwQ/zopududulakuxade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407810/normal_6000ba272cfb2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408348/normal_5feb337d0a7db.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/ehzdPmT/war_of_the_worlds_series_epix_review.pdfIn PDF document text
    • https://cdn.sqhk.co/boxewemutox/g6jjDtg/business_administrator_job_description_sample.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/like_water_for_chocolate_rosaura_quotes2zt5u.pdfIn PDF document text
    • http://goromeo.club/what_important_events_happened_in_the_1900s3dwo8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374366/normal_60031822ac73c.pdfIn PDF document text
    • http://lorewipa.scienceontheweb.net/57877401824.pdfIn PDF document text
    • http://superheatbelt.xyz/wen_3921_scroll_saw_reviewxn9of.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449618/normal_603d6f9f8bfe2.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/832a68a0-b152-4e16-8308-56e845b32be0/reviv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/441a0d41-3aa8-40b0-bd0f-b781190e919d/98466183394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e760c206-63a1-4b9a-ae15-e61342876abf/68689179816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b245b5e-67cd-410e-86f3-a6e26e446c30/59764346251.pdfIn PDF document text
    • http://baletax.onlinewebshop.net/rofufuxinodubelete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75fc009d-0467-4fd4-bd6f-3fc6c36a1b4f/2004_dodge_ram_1500_light_bulbs.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_off00010298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10298 5140 bytes
SHA-256: ef3bdd0b7688590c8bab1653f69aa5fc9c72e15ee8cd41b14ebc39ca186d7a89
font_01_sfnt_off00011406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11406 11328 bytes
SHA-256: cc04ff580efd1bf7bc628ee8d8d1b4a74d67b638881546094085f801668b06e1

Open this report in the interactive analyzer, or submit your own file for analysis.