Malicious PDF — malware analysis report

Static analysis result for SHA-256 89ad67b78bea710c…

MALICIOUS

PDF

72.8 KB Created: 2020-11-25 05:53:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: fd613adddce65d6f8470fd458049ebd8 SHA-1: 1798bf9f9bea949d134f07cd43b2943badd18aa2 SHA-256: 89ad67b78bea710cf57fcdbc0dc1e874557527e2b1af0f7cbe55dc0ef7ffd3af
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous embedded URLs, many of which point to disposable hosting services, suggesting a phishing or scam attempt. The presence of external URIs and the ML classification strongly indicate malicious intent, likely to redirect users to a malicious site.

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://trafftec.ru/strik?utm_term=acrostic+poem+examples+for+names PDF link annotation
    • https://fegunase.weebly.com/uploads/1/3/4/6/134603704/4590140.pdfIn PDF document text
    • https://repotadidutu.weebly.com/uploads/1/3/4/3/134310826/gixinedijeronidibu.pdfIn PDF document text
    • https://rulomegujenuguv.weebly.com/uploads/1/3/4/3/134329868/jinigef-tepaxefam-gupirifejaxote.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/telumuvafe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470523/normal_5fae7f96231ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378152/normal_5fbb1065a116b.pdfIn PDF document text
    • https://vefavufarexuba.weebly.com/uploads/1/3/4/3/134315694/sapovixifozix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385198/normal_5f8e249a8ddcc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/romeo_and_juliet_these_thus_with_a_kiss_i_die.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea5b6a8d-4105-4b4a-8383-b9453e4a0270/97021467002.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/bang_bang_movie_song_pagalworld._io.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/haryana_current_affairs_2018_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d46ded6f-48b6-4adf-a9f0-2aaa8b99e1ce/gazusevanaxusevakasupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cd52b1a-5f5c-4d87-a922-3d371a528a96/stunna_shades_e40.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/52771416439.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/bose_clock_radio_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae8b9462-401a-4e0f-b68b-d7b06fbb57ec/65148716869.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_off0000e084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE084 5216 bytes
SHA-256: e550af01722d128567a34446677a181ceab3f2dac58ea1a95fa7b96d144007d1
font_01_sfnt_off0000f233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF233 10564 bytes
SHA-256: 361276011923bb540c168c6c8dd1b2c72f62e874dc6d7793c76c9814e55108a4

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