Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c67217453f769b…

MALICIOUS

PDF

94.4 KB Created: 2021-03-04 19:42:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6df153dbdd47d0d487af5284a6bf3e03 SHA-1: 720368e9bae83a15ffc1b4b1186a125f3c4b7665 SHA-256: 89c67217453f769b0cde81d4b0a5dd59392d558cf92983435d259bf3599e9b86
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The document body, though heavily obfuscated, appears to be a lure related to vehicle tuning, aiming to disguise the malicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://baarspo.ru/strik?utm_term=how+to+tune+a+3.3+t+maxx PDF link annotation
    • http://ludirobus.getenjoyment.net/55409211212.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/lajix.pdfIn PDF document text
    • http://liwexun.mywebcommunity.org/fofipapigevukesemuba.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/sipugaguzu.pdfIn PDF document text
    • http://delinapod.mypressonline.com/89027060126.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/dream_of_the_rood_line_by_line_translation.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/how_to_check_oil_in_hydrostatic_transmission.pdfIn PDF document text
    • http://sivelural.mygamesonline.org/10861161371.pdfIn PDF document text
    • http://jasazotinalol.mygamesonline.org/86092271599.pdfIn PDF document text
    • http://dotenipago.medianewsonline.com/jozevuvuvif.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://tikomiwewo.atwebpages.com/zorosa.pdfIn PDF document text
    • http://bugenerefajujus.atwebpages.com/how_long_do_kenmore_water_softeners_last.pdfIn PDF document text
    • https://8c1dc56a-a131-4b43-acff-3635b9115217.filesusr.com/ugd/90423f_749442d625ed4efca61e384a8f42cc10.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/300f50ed-c0ab-448f-a394-41f23b7894a3/lofakew.pdfIn PDF document text
    • http://radiviwix.onlinewebshop.net/what_is_the_significance_of_the_invisible_hand_of_the_market.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da5db042-721d-4f53-900c-7cdbd38d6b55/vevipazexenufaj.pdfIn PDF document text
    • https://2b81f3f0-3f46-42ff-87a7-5865dd96cd3c.filesusr.com/ugd/fb41f9_dd3c2da123654367b373c579ba969588.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbc5252e-25d4-4540-8cb0-0e71c39fb719/how_long_is_ruud_water_heater_warranty.pdfIn PDF document text
    • http://rixibedi.onlinewebshop.net/649593450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acab3ae6-3176-400f-a1c1-ca09de27b941/best_navy_jobs_for_females.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82f93e8b-17b8-4aae-bf16-0a44ff5e2ef0/bepajikagegudawawivenuret.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_off00011288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11288 5840 bytes
SHA-256: c68c3d36bad9d9916c6951b7ec1fdb2f892c25954f61746992293fa701c3a4e7
font_01_sfnt_off0001268e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1268E 4676 bytes
SHA-256: d797da7a2b1fbb296cf92d63205a83baa38f40578aaada133213ff6fb4ef3923
font_02_sfnt_off00013673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13673 10928 bytes
SHA-256: 23aa74102bcff77618575832b27c0e0e78351564ae4490609a9e823bc7572a6f
font_03_sfnt_off00015be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BE9 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361