Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c7ed203a7272081…

MALICIOUS

PDF

84.4 KB Created: 2021-02-16 21:21:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 579a00e2808e15e564e81b544ab51992 SHA-1: df813243295851b53c797c248fd5b5a4f05ebb9f SHA-256: 2c7ed203a72720818296dba9ded59901e342c0442b7f79ae9ff1fca767401037
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/123?utm_term=what+is+the+opposite+of+lonely PDF link annotation
    • https://cdn.sqhk.co/denobafopum/ajhjqH5/jedubabini.pdfIn PDF document text
    • http://golden-charm.ru/easy_classical_guitar_songs_to_learn3pg2c.pdfIn PDF document text
    • https://cdn.sqhk.co/gabazumad/UqHjbji/10_day_weather_forecast_for_new_york_state.pdfIn PDF document text
    • http://lovelid.xyz/nabudodawusaqp3cp.pdfIn PDF document text
    • http://fimewot.xyz/top_up_ff_di_dunia_gamessmhtc.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/3ieBjif/tototatunaxoxafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5fe64c6e4cf0e.pdfIn PDF document text
    • http://mishgen.com/18838359885cfcnq.pdfIn PDF document text
    • http://boothattendant.com/battery_charger_subnautica_coordinates8aabf.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/skin_alucard_obsidian_bladev8098.pdfIn PDF document text
    • https://cdn.sqhk.co/webepinovet/NrjgZ0W/rijoli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490132/normal_6012a8a828b03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460466/normal_5fe99e2357aec.pdfIn PDF document text
    • http://deine-gabe.com/tiduxanedudu1yagi.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/tijaj7ahkv.pdfIn PDF document text
    • http://fullpisetc.ru/easy_screen_recorder_crack_appxtw02.pdfIn PDF document text
    • http://mmmmmme.space/sense_flip_clock_weather_pro6ciwt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393506/normal_5ffc213f7366d.pdfIn PDF document text
    • http://idealicait.website/joxiwotufifaxibaa7oqf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bajobakokela.epizy.com/61594398124.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_off00010f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F26 5008 bytes
SHA-256: 64ede62452827bc06bd606433b50565877ebe7acbc1c3a85fc89a6e109cc10b1
font_01_sfnt_off00012046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12046 10468 bytes
SHA-256: c159c15d97b9527d75e43247caabbd35743bcfa516e101344367dacb694344a9

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