Malicious PDF — malware analysis report

Static analysis result for SHA-256 86223d7da7863256…

MALICIOUS

PDF

77.8 KB Created: 2021-03-24 01:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1b9c13dd191ca3b6f5d73732379ab596 SHA-1: 43a6e666389eb191761335a85f9450aede69559a SHA-256: 86223d7da7863256d477c19b7ab58ac8051913f70437e945bfb8d2dd1c7a05b4
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host many links on disposable domains, likely to facilitate phishing or malware distribution. The presence of external URIs and the overall structure point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/strik?utm_term=henry+van+dyke+quotes+dying PDF link annotation
    • https://vanakiti.weebly.com/uploads/1/3/5/3/135323710/dofoj.pdfIn PDF document text
    • https://cdn.sqhk.co/xagegegozi/a1ujdLa/marvel_unlimited_app_review.pdfIn PDF document text
    • https://libodarupebixab.weebly.com/uploads/1/3/0/9/130969674/36190d.pdfIn PDF document text
    • https://rinixupikexem.weebly.com/uploads/1/3/4/0/134096042/614de2e96.pdfIn PDF document text
    • https://muwikoli.weebly.com/uploads/1/3/2/7/132740525/kafevimuwibuzexete.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/taylor_swift_fearless_album_download_mp3.pdfIn PDF document text
    • https://kebiluxo.weebly.com/uploads/1/3/1/4/131455508/637316.pdfIn PDF document text
    • http://korogesubelokut.mypressonline.com/48810036702.pdfIn PDF document text
    • https://cdn.sqhk.co/fegozanodedu/gcih2JN/restaurant_tycoon_cooking_game_mod_apk.pdfIn PDF document text
    • http://ganitigusawev.mygamesonline.org/a_thousand_splendid_suns_symbols_and_motifs.pdfIn PDF document text
    • http://gepanukotex.getenjoyment.net/94026141979.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/OhgOGzG/94332413614.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/xiae6ji/nerf_epic_pranks_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tamovagag/sample_biodata_for_marriage_doc.pdfIn PDF document text
    • http://wutodabegaf.epizy.com/amrae_formation_2019.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/walden_thoreau_full_text.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/free_form_i-_864a_affidavit_of_support.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/pejosogadimejigutemed.pdfIn PDF document text
    • http://dirulibas.onlinewebshop.net/physics_important_formulas_for_neet_download.pdfIn PDF document text
    • http://zonidagaxa.epizy.com/54497558807.pdfIn PDF document text
    • http://jilusizupofa.epizy.com/mutebadafavu.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/bosch_dishwasher_warranty.pdfIn PDF document text
    • http://ruzofugeru.myartsonline.com/paxapudazizolumizad.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/mabuchi_motor_rs-_555ph_datasheet.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_off0000f060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF060 5272 bytes
SHA-256: ebb55423827d126bcd8cf9b83086853d0e5c305252412f3dbe3307ec1dca1faf
font_01_sfnt_off00010265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10265 11164 bytes
SHA-256: 0d3e0a17f6418126f4bd76477d136e31dbf2890c07d64985da8eee9cf8f8c087

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