Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e45654ffae065bb…

MALICIOUS

PDF

80.2 KB Created: 2021-05-08 17:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: fe53f5af4e8bce0b20087897c7583967 SHA-1: 7c4c919cf9dce4425a87bc8d250d8bad92287adb SHA-256: 8e45654ffae065bbcd011f5e4e6d43528cc63bab96cfc064d531f68703b388b5
126 Risk Score

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 for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farm characteristics further supports this assessment.

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://soxebez.ru/strik?utm_term=how+to+start+bosch+dishwasher+silence+plus+46+dba PDF link annotation
    • http://sedouche.xyz/63572033989ax913.pdfIn PDF document text
    • https://mibubibot.weebly.com/uploads/1/3/1/8/131871690/4307551.pdfIn PDF document text
    • http://org-fruit.space/pdf_preview_handler_not_working_in_outlook_365aarvo.pdfIn PDF document text
    • http://kefets.xyz/zakalakuvatasuxiu6sgj.pdfIn PDF document text
    • http://vbruti.site/65507483036zyv4g.pdfIn PDF document text
    • http://fastgetme.online/divoperurawiboneferajomik0pug.pdfIn PDF document text
    • http://jifarobajis.sportsontheweb.net/botafufofota.pdfIn PDF document text
    • http://jivavesomuviz.getenjoyment.net/kefugujo.pdfIn PDF document text
    • http://harmony-market.ru/badlands_2500_winch_specsx4grz.pdfIn PDF document text
    • https://dujakoxuk.weebly.com/uploads/1/3/1/4/131483447/gexuj_vomifewudifomi_sipowobiro.pdfIn PDF document text
    • https://wisejagu.weebly.com/uploads/1/3/4/8/134881465/62756e8acc4.pdfIn PDF document text
    • https://mubajodopiwal.weebly.com/uploads/1/3/1/4/131454521/nolopaf.pdfIn PDF document text
    • http://1yamal.space/15826309518die7k.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://budakokubogomax.rf.gd/98381295640.pdfIn PDF document text
    • http://jinisobijeg.rf.gd/how_to_get_a_copy_of_ssa_1099.pdfIn PDF document text
    • http://poliwukumepi.rf.gd/cisco_phone_model_cp-8841_user_guide.pdfIn PDF document text
    • http://neluwomarar.epizy.com/burrito_boyz_menu.pdfIn PDF document text
    • http://dixasimoxipux.rf.gd/bazaviti.pdfIn PDF document text
    • http://dufogatate.epizy.com/pre_cursive_letter_formation_sheet.pdfIn PDF document text
    • http://nujajixunagiweb.epizy.com/biology_final_exam_review.pdfIn PDF document text
    • http://tisenunab.rf.gd/janelorolafojarubet.pdfIn PDF document text
    • http://veziledijiv.rf.gd/french_spanish_dictionary.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA4 5476 bytes
SHA-256: d0331436d62796095f9998e61fa8c790f821054470cf2e4c682d8fe7aa7e8377
font_01_sfnt_off0001004b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004B 10784 bytes
SHA-256: b060d7fa03cbebf3e63ee5ae2b5cf910749af123f88a6df393fe73204c572b7b
font_02_sfnt_off000124e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E5 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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