Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea59c94b474816f7…

MALICIOUS

PDF

79.2 KB Created: 2021-05-12 01:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 75e3757bf92d23ed05a9a9b339579ac1 SHA-1: 201474826be6b88662a734e766fbb03ae5869d05 SHA-256: ea59c94b474816f7239c43c969d7399963bfe69fc6eb7b7bc689044f1dbd158d
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users by directing them to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/strik?utm_term=what+does+the+us+constitution+say+about+foreign+interference+in+elections PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454673/normal_60636ae6d9af7.pdfIn PDF document text
    • http://hardcreditcheck.info/windows_10_pro_free_download_full_version_20195hkxi.pdfIn PDF document text
    • https://cdn.sqhk.co/tusadopovet/jfpfhhp/1082606601.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403951/normal_5ffce3bf8f8ca.pdfIn PDF document text
    • http://optamorem.com/95671563422v6rnc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370090/normal_5fce649e8af26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368768/normal_6055b66bdfea0.pdfIn PDF document text
    • http://videgimasifo.iblogger.org/59252422595.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5fd7d20770516.pdfIn PDF document text
    • https://cdn.sqhk.co/jujifefa/Yfd3jes/34857641580.pdfIn PDF document text
    • https://cdn.sqhk.co/luwukamuku/hJja1ev/24018029082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450721/normal_5fd9742c32f5b.pdfIn PDF document text
    • http://megahit.space/minority_interest_balance_sheet_accounting22631.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/b78jegc/light_and_airy_presets_for_lightroom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393358/normal_6018823014352.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418184/normal_600236cb4b489.pdfIn PDF document text
    • https://cdn.sqhk.co/xeposetuge/gm66nih/formula_1_2019_race_results.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jakowufa.epizy.com/24086578739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9290549-72a1-4b8f-9760-2393fe9fa814/dark_sun_boxed_set.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e3b93e9-64dc-4bee-9bec-b3450d14d026/where_is_the_mic_on_playstation_gold_headset.pdfIn PDF document text
    • http://fimorezurisu.rf.gd/cpet_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28bb0840-0fec-4bd4-910a-31f5a2822a60/94709104024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cf05a3b-d9f0-4122-bd32-9c1e01ae32d9/divergent_movie_download_in_hindi_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6175a781-5c7b-4c57-8c18-0ce964b9f121/chapter_5_test_form_a_the_united_states_answers.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_off0000f7cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CB 5536 bytes
SHA-256: a45eb1eb1b58be4e23a34ea5ea7d4fff9dedf88775325a04cb4b109bd6d94639
font_01_sfnt_off00010aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAE 10440 bytes
SHA-256: 1776fe21658ceb646ca86be8452b8d7659dabeba5e5e0e8c97d0c9676e0be640