Malicious PDF — malware analysis report

Static analysis result for SHA-256 a63c6fc089407745…

MALICIOUS

PDF

77.8 KB Created: 2021-06-05 21:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: fded9a29c04457f298e708927aa537aa SHA-1: d74842807a56bc071001a339873a369b247d43e8 SHA-256: a63c6fc089407745cd880419db02ca9fdc691f90d6500a5f7c2911d9789614a3
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of external links, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or SEO spam. The embedded URL 'https://resalured.ru/123?utm_term=breakup+playlist+full+movie+free' is a primary indicator of this malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/123?utm_term=breakup+playlist+full+movie+free PDF link annotation
    • https://jafuxudaxifi.weebly.com/uploads/1/3/0/7/130739212/2453583.pdfIn PDF document text
    • https://nukewixe.weebly.com/uploads/1/3/4/3/134385223/zazen_ferok.pdfIn PDF document text
    • https://koximewi.weebly.com/uploads/1/3/0/7/130775363/9491728.pdfIn PDF document text
    • https://numazerezawikar.weebly.com/uploads/1/3/4/6/134618887/b74597.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/59e70766-a2ee-4681-a6ae-1a8d66ac8f2c/esquema_de_la_historia_natural_de_la_enfermedad_del_dengue.pdfIn PDF document text
    • http://mumubib.pbworks.com/f/coreldraw_x5_crack_file.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1bdac18-7c20-4f02-9c66-13338c01823c/78062818486.pdfIn PDF document text
    • http://muzupusap.pbworks.com/w/file/fetch/144597387/niluganizutuziwivejo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59837862-b1c5-4f5e-b558-e48677775df3/17190855823.pdfIn PDF document text
    • http://zigunef.pbworks.com/w/file/fetch/144479217/guvis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66cc9d18-7f24-4270-9687-316242f21348/personajes_de_cazadores_de_sombras_libros.pdfIn PDF document text
    • http://vugufosenene.pbworks.com/w/file/fetch/144604203/land_rover_freelander_2_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de6167d4-34d6-437b-8dce-cedb736437fb/what_is_economics_definition_for_class_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef82df0f-baae-45e5-807c-ecc63daea27a/bilunusekam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9f83fc6-799c-4407-94fd-0ee4aecc7b82/what_are_the_biological_functions_of_carbohydrates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/296ff157-9ee7-4258-8d94-24e0b8179b03/xezamanodojipapep.pdfIn PDF document text
    • http://lulimogosan.pbworks.com/w/file/fetch/144492582/the_legend_of_zelda_the_minish_cap_nintendo_game_boy_advance_rom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0f72fb7-2fa1-433c-8bde-7ddfe7f6ff57/71659432128.pdfIn PDF document text
    • http://zezimin.pbworks.com/w/file/fetch/144412056/vobobevedotikire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e47fb227-05b2-4b80-a35d-9bce248655cc/59117081615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/162de864-b07f-4406-9b26-87edcbb87c0c/63379745809.pdfIn PDF document text
    • http://niwomif.pbworks.com/w/file/fetch/144424359/pokemon_planet_free_money_hack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdf94099-80cf-45c1-8759-71ec8a4e9934/suboxexakon.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_off0000f0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DE 5324 bytes
SHA-256: 61d6eed1c6eeefd48b3c82c698a339bfd73350070c8f2b338ca73307da7697ba
font_01_sfnt_off000102f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F6 11148 bytes
SHA-256: 308823704aff8fc253124d68eb3ccc69842581bbaf711e6b242da4660097d2c2