Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc45f6627121274…

MALICIOUS

PDF

73.0 KB Created: 2021-03-17 08:35:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 39845cada7b32fa0535687823a696c9b SHA-1: 7cd3ca12ee8ab78492e60af4444cbff67cbf2d6b SHA-256: 2bc45f6627121274d775ac5a73a2d920c380701df3cc0a222ce57355a5125c92
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, indicative of a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://mezovuduw.ru/strik?utm_term=bose+wave+music+system+iii+cd+not+playable PDF link annotation
    • https://gosabotef.weebly.com/uploads/1/3/4/3/134332229/pavakexapikavur-radatefaked-kojikipewu.pdfIn PDF document text
    • https://jibizixowaxen.weebly.com/uploads/1/3/5/2/135296653/xapawujigasob.pdfIn PDF document text
    • http://madawuboso.sportsontheweb.net/87383311162.pdfIn PDF document text
    • https://cdn.sqhk.co/rovujesox/gchfejh/wearable_backpacks_mod_for_minecraft_pe.pdfIn PDF document text
    • https://cdn.sqhk.co/gapalagabig/jghdgfE/past_present_future_tense_worksheets_grade_6.pdfIn PDF document text
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/2594250.pdfIn PDF document text
    • https://nulevilisibonu.weebly.com/uploads/1/3/4/5/134585613/115127.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
    • https://b3d988c2-7a7d-4c3c-9141-221b6550481e.filesusr.com/ugd/9dda13_4a1fb0ffa6b7400081514cf43817fe9b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ee3cbd3-2881-4f8c-9243-5c50750819ac/ryobi_router_base_plate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eac7f01-f258-407d-b3ee-83752864e1a7/laxepik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a4e7fb1-c30c-4a00-9217-fffa3c051e5f/how_do_i_increase_the_pressure_on_my_breville_espresso_machine.pdfIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_0478630c969a42c690bf3e94ea287d10.pdf?index=trueIn PDF document text
    • https://5b3fc17b-a4fb-4144-9a53-ff617e35bc6a.filesusr.com/ugd/696117_eadff6bf8bf145b7ac84389c24a5ced8.pdf?index=trueIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_3ceead73d80748db8b7bbf86d636b269.pdf?index=trueIn PDF document text
    • https://0aa989e7-076c-475f-bc22-fff5ae310860.filesusr.com/ugd/b44be6_43b19ea33b0a4cce8ec48c9231e9211c.pdf?index=trueIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_6dfd455577bc4aa9a193638d6bc0d6cd.pdf?index=trueIn PDF document text
    • http://tipokeviti.atwebpages.com/rapugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eeb595f-1fcc-4972-88d6-e230a68276af/xakogi.pdfIn PDF document text
    • http://zoligagomuwe.onlinewebshop.net/wezadomulorajejalalul.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_off0000d1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CB 5448 bytes
SHA-256: 74b46535df11f5837725c248785b64dc3961eadb946f9dc99fbf57fe9063ef41
font_01_sfnt_off0000e457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE457 10556 bytes
SHA-256: cc2eb09c4d57ab55e01e4e299f1649b106729616a1830579f5e5e7bb6ef5de96
font_02_sfnt_off0001088f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361