Malicious PDF — malware analysis report

Static analysis result for SHA-256 79817f44d185c8e4…

MALICIOUS

PDF

105.6 KB Created: 2021-03-04 05:00:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: cd75f9e6ee4bd6a181c12c6e4460197f SHA-1: dea937df2de028a208a3da3d169d999c34202dfb SHA-256: 79817f44d185c8e402a1d40f099622ed177b1a17571eb662ed41a9c5a235f334
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous embedded URLs suggest the document is designed to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://nipisod.ru/strik?utm_term=what+eastern+philosophy PDF link annotation
    • http://mif-smeh.space/facebook_3d_photo_depth_map_photoshopmjusa.pdfIn PDF document text
    • http://avto-trokot.xyz/12898095815zasq2.pdfIn PDF document text
    • https://cdn.sqhk.co/zamupefa/gi3N7jg/zobuxorovogeratejal.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/di9IjhB/33229391568.pdfIn PDF document text
    • https://cdn.sqhk.co/vopovaroxamo/LL4sSha/20029794820.pdfIn PDF document text
    • https://cdn.sqhk.co/xabovalizo/DsjgmhE/off_road_cycle_3d.pdfIn PDF document text
    • http://tetutunugu.iblogger.org/getemositunuwubakijoxaj.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/bhdX0ge/zepeto_apk_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/s8Fgdic/12950821598.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vogasuzifen.rf.gd/83881747537.pdfIn PDF document text
    • http://xeroxuzowi.epizy.com/binomial_expansion_a_level.pdfIn PDF document text
    • http://xotewewo.rf.gd/astron_vs-35m_schematic.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/el_poder_de_la_esposa_que_ora_dia_5.pdfIn PDF document text
    • http://vubefezit.rf.gd/medical_physiology_salary_uk.pdfIn PDF document text
    • http://netixino.epizy.com/whirlpool_extra_fridge_shelf.pdfIn PDF document text
    • http://rofoxupumixe.epizy.com/kajuxerudoge.pdfIn PDF document text
    • http://zerijuge.epizy.com/what_is_agile_cycle_time.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE0 5324 bytes
SHA-256: 7415b1de4d02905d5bc69bf33907595b351a517666027a67c7082e51ce453b3a
font_01_sfnt_off00014ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FFD 4808 bytes
SHA-256: 6b0842105779d3e23a6ede152aba4005a34b10dfdcc7857dcf377c1cc491093b
font_02_sfnt_off00016051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16051 13316 bytes
SHA-256: 972b6e4c1c69892e80da60cf2754a794c499e10a8f9ebd695f97b9dd75a928d2
font_03_sfnt_off00018abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18ABE 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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