Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ffeadc06fe091d9…

MALICIOUS

PDF

70.7 KB Created: 2021-02-15 15:20:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a64a86f289f8a4d9c4feb6aa391a4e6b SHA-1: 25f4366d8a95ec9abab37784a3be58f2aab5bc64 SHA-256: 3ffeadc06fe091d95aa26d06e2d0732fc31f3f8e02f337d79cb0d5c62e5c715e
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, and contains a large number of external links, many pointing to disposable domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a link farm structure, suggesting the primary purpose is to manipulate search engine results or redirect users to potentially harmful content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm suggest a potential for further malicious activity.

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://druttle.ru/strik?utm_term=can+you+replace+knobs+on+gas+stove PDF link annotation
    • https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/jenim.pdfIn PDF document text
    • http://fruitnaturs.space/song_of_the_sea_movie_soundtrack_lyricsest1i.pdfIn PDF document text
    • http://ayazshabutdinov.club/business_game_mod_apk09hjw.pdfIn PDF document text
    • http://choosemadam.site/dimensional_analysis_worksheet_keyt6q03.pdfIn PDF document text
    • https://wokawopirajer.weebly.com/uploads/1/3/3/9/133999547/buliwotanumamuxet.pdfIn PDF document text
    • http://eurostore.info/asp._net_e-_commerce_templates_freerve00.pdfIn PDF document text
    • http://itali-big.space/jifosenoloroari9w.pdfIn PDF document text
    • https://lekemevegov.weebly.com/uploads/1/3/1/4/131410090/xidizewonoxeza.pdfIn PDF document text
    • http://snapchat-alert.com/355592519553ccpp.pdfIn PDF document text
    • https://kuvezuwuziteb.weebly.com/uploads/1/3/4/3/134388010/538d702c70.pdfIn PDF document text
    • http://buledumemo.iblogger.org/run_android_apps_on_pc_chrome.pdfIn PDF document text
    • https://betixajivuf.weebly.com/uploads/1/3/4/9/134900014/zidiwani-tazoweduvutoz.pdfIn PDF document text
    • https://tugixafebav.weebly.com/uploads/1/3/2/6/132681891/18acb59.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://maferodo.epizy.com/46553801273.pdfIn PDF document text
    • http://tikarere.epizy.com/frictional_force_experiment_lab_report.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE91 2968 bytes
SHA-256: 1c91280eb79ffdc858b6ecd2b9b1b9121e398c569f5702dd47e27479ee3b0056
font_01_sfnt_off0000d937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD937 5372 bytes
SHA-256: 888c25ad5fade9d3fbcd90910f3fe09863317806b3d5a6294114112bc4db60f4
font_02_sfnt_off0000eb95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB95 9872 bytes
SHA-256: 1fa2979cf58a5953f77ee981b11c7b0fed87c8cfe3e666d5439c9c5795af5b6f

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