Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db21601c887c40a…

MALICIOUS

PDF

76.6 KB Created: 2021-06-05 00:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 55cc88b1c0ff8d56217d8f9f2f4f1d7d SHA-1: 3ed679ddc5f0c66d85f2c6dd31a6b003de56b592 SHA-256: 0db21601c887c40ac7c39ceaae293332e68d6fa7b9a8f06dbe2842b659d1064d
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://medvor.ru/pbw?utm_term=the+twilight+saga+eclipse+full+movie+in+hindi+dubbed+480p+download PDF link annotation
    • https://pelirexasi.weebly.com/uploads/1/3/4/3/134352860/6320017.pdfIn PDF document text
    • https://sutovuwoti.weebly.com/uploads/1/3/0/9/130968995/riwosokamisexobog.pdfIn PDF document text
    • https://vumerajijo.weebly.com/uploads/1/3/2/8/132815742/7f42253009363.pdfIn PDF document text
    • https://fofijibub.weebly.com/uploads/1/3/3/9/133999799/nezupeja.pdfIn PDF document text
    • https://nuvosukive.weebly.com/uploads/1/3/4/7/134718285/6763441.pdfIn PDF document text
    • https://pulakaxumif.weebly.com/uploads/1/3/0/7/130776647/9091378.pdfIn PDF document text
    • https://luzenage.weebly.com/uploads/1/3/4/3/134317967/tolisujesipa-wulanap-xeweratup-jojuxetip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rasovuxosew.pbworks.com/f/how_to_login_to_hulu_with_disney_bundle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf4693a3-e1fc-4eea-b3d9-f7ff8c48dd83/how_to_do_half_life_problems_precalc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7dec70f-9ecb-4e7a-b726-d784a01f8e80/55198340808.pdfIn PDF document text
    • http://vafobotigef.pbworks.com/w/file/fetch/144631200/nonton_drama_cambrian_period_sub_indo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92929af8-6f83-4d45-b449-a9c9f5e73bcc/dulomijorubasugevaminove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1829173-5a9a-46f1-b2dc-742ca9974a3c/how_do_u_describe_a_rainbow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d65f27f-08c9-499a-bb77-47803df9589c/jisumepubew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c16f03ad-77e3-4c33-b41b-9ff6716fc61a/how_do_i_program_my_denon_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca8508a2-829c-44f9-92a6-383a294b0936/joseph_prince_sermon_notes_on_communion.pdfIn PDF document text
    • http://xodelow.pbworks.com/w/file/fetch/144470820/94744874213.pdfIn PDF document text
    • http://tagexoba.pbworks.com/f/lenelokesef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fea55649-ac1f-4811-8f9f-648dae259b14/htc_one_m8_case.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24061422-3b90-41cf-bbc1-cb48ce1e75c1/hp_laserjet_2100tn_network_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d29ad204-7c82-408c-9e57-ad4499d533b4/the_evolutionary_psychology_behind_politics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eb4cd85-5382-4b83-a854-ae2075be0bd5/48370698720.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2bd129a-35f6-40e5-8868-e7d16f0fc2fb/kilodedenaxeroda.pdfIn PDF document text
    • http://nikekuva.pbworks.com/f/ferruccio_lamborghini_and_enzo_ferrari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bbcc57e-1acc-425d-9542-ef7ebdc20b3b/master_of_the_universe_lyrics_by_elijah.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_off0000e6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A1 6140 bytes
SHA-256: 8105b71fc2a905711e290e4aa729d7ba92b8ab3efd8f751617a90c74d4d6fc3e
font_01_sfnt_off0000fb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7F 12000 bytes
SHA-256: 5c70c73ecf3aaf59e98f03297592cdfd6c1809448f14e465539b9ced70636b9b