Malicious PDF — malware analysis report

Static analysis result for SHA-256 863ddb5705d5280a…

MALICIOUS

PDF

63.7 KB Created: 2021-01-19 16:41:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d8cfe66d3fd0633cf2bf42d3bb1029ff SHA-1: 7ef6c5a2c9542b19aea0fc210c37015df30683e2 SHA-256: 863ddb5705d5280a5e6c201a076a4d89f544224f8f3ed2941e5b6ca8a7430791
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to exploit users by directing them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=just+build+2+unblocked PDF link annotation
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/palaj_xofepevez.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/ge5fhiR/stay_z__2.pdfIn PDF document text
    • https://cdn.sqhk.co/retepisej/hfgohcL/migesexixoxokozorugukas.pdfIn PDF document text
    • https://site-1176228.mozfiles.com/files/1176228/72711404959.pdfIn PDF document text
    • https://cdn.sqhk.co/rizakumer/Tgegdnr/91937424521.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/ghha5qQ/rivizedopadev.pdfIn PDF document text
    • https://cdn.sqhk.co/ledusefugize/Qggheqj/brick_wall_png_image.pdfIn PDF document text
    • https://cdn.sqhk.co/vedanoderifu/cQjheoA/wooden_sofa_set_designs_in_kerala.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/jaA71ha/baloxibumuri.pdfIn PDF document text
    • https://cdn.sqhk.co/nenuguvan/okMUhdP/pro_name_generator_for_free_ffxiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490547/normal_5fec0c8ad3e2a.pdfIn PDF document text
    • https://jatitebomotopoz.weebly.com/uploads/1/3/0/7/130776336/toditurazofudup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423171/normal_5fbc9f2018918.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370072/normal_5f892db910611.pdfIn PDF document text
    • https://cdn.sqhk.co/lamajemomu/gcihqjf/voworujupozokuzuse.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxugaveg/4jipvia/planets_at_war_movie_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/fewukise/7ifhc3t/business_process_management_examples.pdfIn PDF document text
    • https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/1e23a7.pdfIn PDF document text
    • https://site-1187516.mozfiles.com/files/1187516/coloring_pages_halloween_bats.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000bea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEA4 4952 bytes
SHA-256: 0ec32a0257a66221fd2801df8c5276cd05f0946bacd89b41d2b92cd42a824c2b
font_01_sfnt_off0000cf8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8F 9928 bytes
SHA-256: 8dd7527a34d2e553c23c973bb618393375ec12778456f871f7a7dfd2a9d14205

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