Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f4e23de9cd9b5b…

MALICIOUS

PDF

69.6 KB Created: 2021-04-02 15:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 847e7c3bb4cc987fe01ff54aa236da66 SHA-1: 28944e60af6c4944febcdeb491956d4c3862823f SHA-256: 07f4e23de9cd9b5b12dad6a3c8448647bfa1fb7d170c04f75fc3207656012ebc
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous URLs are indicative of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=here+am+i+send+me+hymn
    • https://vavaterojitenoj.weebly.com/uploads/1/3/4/8/134898986/8251354.pdf
    • https://vubufogos.weebly.com/uploads/1/3/4/7/134766152/jogof.pdf
    • http://tugokutuli.scienceontheweb.net/varicocele_sintomas.pdf
    • https://xalovediluf.weebly.com/uploads/1/3/1/3/131380345/sakagumepeze.pdf
    • https://jumaxejew.weebly.com/uploads/1/3/1/6/131606465/58eb2de9e.pdf
    • https://cdn.sqhk.co/zegofurop/cpjggjd/getcha_live_claw_machine_toy_cranes.pdf
    • https://wiwazojuxosupud.weebly.com/uploads/1/3/1/3/131379189/4624307.pdf
    • https://cdn.sqhk.co/puxumede/2uwhaFE/archero_guide_chapter_2.pdf
    • https://gugamuwapubadek.weebly.com/uploads/1/3/0/7/130740318/mogederirujuwurub.pdf
    • https://cdn.sqhk.co/rusukumuva/bjh77hi/what_do_you_learn_in_business_management_classes.pdf
    • https://fekujerixotose.weebly.com/uploads/1/3/4/8/134896765/5215664.pdf
    • http://fisareboveda.getenjoyment.net/pdf_to_word_editing_software.pdf
    • https://dizavobezovedup.weebly.com/uploads/1/3/5/3/135313146/rixeganurikagunu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_bc0c5ae128244ca18f769035c5540692.pdf?index=true
    • http://nizofikunatafu.atwebpages.com/55221427265.pdf
    • https://uploads.strikinglycdn.com/files/9deb74ab-3b5a-4fe0-8b34-8bf0f080fd52/nanekinuzefinovuniv.pdf
    • https://uploads.strikinglycdn.com/files/6f744c01-ff27-4f42-bf1b-0cadc08704da/rofulujafozadozutuxezumos.pdf
    • https://uploads.strikinglycdn.com/files/156c1057-29eb-4fa1-9e5b-0b07b8cbf50a/time_capsule_definition_music.pdf
    • https://uploads.strikinglycdn.com/files/9259c30f-e436-443d-a8ab-94b35b1d3b4c/83211602455.pdf
    • https://uploads.strikinglycdn.com/files/5c2088f4-5c1b-4735-b912-4dc1059ae908/systemverilog_interface_within_interface.pdf
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_63ea135b367d4fa6beb915a18e46d2ea.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3c8.bin
dbcefabde1a483f7fb4ba8324c42654d3fea38a08bb99e928e03814dc8ba3e33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C8 5096 bytes
font_01_sfnt_off0000e4f1.bin
65d617fd271ff5ce2c5d5178f31ca424dd46802a5f3afce3da1dc5fd099bffa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F1 10624 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.