Malicious PDF — malware analysis report

Static analysis result for SHA-256 f30056af7bf4e657…

MALICIOUS

PDF

98.7 KB Created: 2021-03-14 16:13:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3eaa3ccac54b65d2679980f6436c3d7e SHA-1: 5db710d9cd2f2ff89ea49966f492875049422977 SHA-256: f30056af7bf4e657316a3c9d3a887292a97e61b44bfee282b33e14d157e84c05
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains keywords related to 'Fallout 3 mod guide 2019' and 'wkhtmltopdf', indicating a potential lure to disguise malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://pelibifir.ru/wix?keyword=fallout+3+mod+guide+2019 PDF link annotation
    • https://cdn.sqhk.co/pefemezized/gjVgia5/58871601847.pdfIn PDF document text
    • https://cdn.sqhk.co/wukufazujuv/avjBHac/90369471305.pdfIn PDF document text
    • http://seplafond.xyz/mini_dvi_to_hdmi0jjpb.pdfIn PDF document text
    • http://mujudesuxiropa.sportsontheweb.net/mini_cooper_service_manual_r56.pdfIn PDF document text
    • https://cdn.sqhk.co/lekaguko/igjxifr/smart_iphone_charger_cable.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuzigup/P7pKii9/carpet_cleaner_home_depot_review.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/why_did_finnick_leave_beetee.pdfIn PDF document text
    • http://stroy-level.ru/vavedexumuzozirorekubeze0ktyp.pdfIn PDF document text
    • http://feldhaus-klinker-plitka.ru/nikon_speedlight_sb-800_vs_sb-700pie3h.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/IheYOmX/speed_motors_llc_arlington_tx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5fd18b47ed995.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414336/normal_5fee70a9ab252.pdfIn PDF document text
    • http://gixipures.sportsontheweb.net/best_free_2d_animation_software_for_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/eujjhgf/17594191894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5fdaf9ef39449.pdfIn PDF document text
    • http://kersita.space/libros_de_fisica_gratis_para_descargar8eqgz.pdfIn PDF document text
    • https://cdn.sqhk.co/tekemozuj/ChKZmha/celestial_king_s_assault.pdfIn PDF document text
    • https://cdn.sqhk.co/guwodirulik/hhvjfmE/achilles_tendonitis_patient_information.pdfIn PDF document text
    • http://reflectionss.space/uc_neopets_guidetycuv.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/iijicgh/riruga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://darotevu.rf.gd/20195904681.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/23279396020.pdfIn PDF document text
    • http://fobowolim.rf.gd/16708153055.pdfIn PDF document text
    • http://widafasamuj.epizy.com/automobile_engineering_books_download.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_off0001437e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1437E 5472 bytes
SHA-256: 516fd31362c66c65a026d48003f6c8941d6ace81c738728a81f7d1577bfd5453
font_01_sfnt_off0001560f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1560F 11576 bytes
SHA-256: 8c757200139f1fafa1a2af8adbeeb1620188c2ed93fb60b7dda40f77fb59c109

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