Malicious PDF — malware analysis report

Static analysis result for SHA-256 69476e6a12bae8e5…

MALICIOUS

PDF

73.4 KB Created: 2021-04-23 08:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: af7d3c9962194842dcf91fba2594bca1 SHA-1: be80e4de9e3fa1db18fec995e159cca9f501d2b1 SHA-256: 69476e6a12bae8e53b53c534f115ed4c8db8ed9c17f8a61c5b8f35a18c413ed7
244 Risk Score

Malware Insights

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

This PDF document functions as a link farm, presenting numerous links under the guise of a free audiobook download. The primary link redirects to a malicious redirector, which then leads to a collection of other PDF files hosted on various domains, many of which are disposable. This indicates a phishing or scam attempt designed to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=harry+potter+und+der+stein+der+weisen+audiobook+free+download In PDF document text
    • https://pafegesufo.weebly.com/uploads/1/3/4/7/134719460/c4cd17d.pdfIn PDF document text
    • https://cdn.sqhk.co/boxepupovemu/ifghgcL/annelids_online_battle_mod.pdfIn PDF document text
    • http://outputqwvk.space/taxamisejisarademudixu8ie0w.pdfIn PDF document text
    • http://gavediteriremuv.medianewsonline.com/wasifojiwirifa.pdfIn PDF document text
    • https://javesuput.weebly.com/uploads/1/3/0/8/130873829/nameborirevu.pdfIn PDF document text
    • https://cdn.sqhk.co/bomoxale/ohbljbL/29243304550.pdfIn PDF document text
    • http://fartook.online/9206049197169yn2.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/iPggOCM/voraxebukutaduvuzesej.pdfIn PDF document text
    • http://tatanip.medianewsonline.com/gexug.pdfIn PDF document text
    • https://cdn.sqhk.co/padezeda/Gjih7gj/mejopatinobunuk.pdfIn PDF document text
    • https://baboxubawuxi.weebly.com/uploads/1/3/4/6/134666135/xedek_besabos_satukusapobev_zubuvuribagites.pdfIn PDF document text
    • https://cdn.sqhk.co/tasaxasup/EjiRlhf/what_are_you_doing_tonight_yahoo_answers.pdfIn PDF document text
    • http://smirno.life/9933310103775xk4.pdfIn PDF document text
    • http://terem.space/alaska_drivers_license_renewal_locations7rzol.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/dijboji/najefoxeponarojazine.pdfIn PDF document text
    • https://cdn.sqhk.co/xovinexesun/cicEbwk/vesomomurakufojibonenavem.pdfIn PDF document text
    • http://reduslim-siteofficial.site/skater_xl_maps_ps45sxel.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/h5QEYze/rovivi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vesedakowata.onlinewebshop.net/presentation_letter_example.pdfIn PDF document text
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_b010e364c7c747c98c257bf4fe9dbdee.pdf?index=trueIn PDF document text
    • https://2791e1c6-719d-47aa-bdc5-1556df251b63.filesusr.com/ugd/7757c5_d7cce35fc6934d929bd71f430e4f96f3.pdf?index=trueIn PDF document text
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_88e127529c8f4eb98dc58ac7b047feba.pdf?index=trueIn PDF document text
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_03e8358ec7a9472eb0099515484af5d1.pdf?index=trueIn 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_off0000de06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE06 5392 bytes
SHA-256: f1144adff58cf3500a687bf58b97b073545ff26ae6cfe0421dbf04b20328a6c8
font_01_sfnt_off0000f080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF080 11284 bytes
SHA-256: aa327dec5df4124a5083ebe4c0e938144c25ab34218b5c0179ffa6e4c9e700e3