Malicious PDF — malware analysis report

Static analysis result for SHA-256 d005ff26655cf6b0…

MALICIOUS

PDF

80.6 KB Created: 2021-03-17 17:05:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e9de06d655f5374461d717f4fbe37d3f SHA-1: 10068624c1f5807d3af9359e9620a810178c0e4c SHA-256: d005ff26655cf6b077dae1505d2971edb3228176735da2aafc8094c836e82297
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains, indicative of a link farm or SEO abuse. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/wix?keyword=mermaid+chronicles+part+1+she+creature+watch+online PDF link annotation
    • http://fepaporipevari.mypressonline.com/semuvus.pdfIn PDF document text
    • http://fekevopimibun.sportsontheweb.net/58980673564.pdfIn PDF document text
    • http://dutov.org/36921383605w152w.pdfIn PDF document text
    • https://ronewomiz.weebly.com/uploads/1/3/0/8/130874064/zedesin-xopewiso.pdfIn PDF document text
    • http://xelowonol.scienceontheweb.net/80338425430.pdfIn PDF document text
    • http://tiktokhd.design/what_is_the_cheapest_thing_at_starbuckspuc8o.pdfIn PDF document text
    • http://floradoma.net/kivorigitafulamur6vbt4.pdfIn PDF document text
    • https://zuwodavipufowaf.weebly.com/uploads/1/3/1/4/131408056/jonevejalixado_karadudoxenebo_fasokiritugo.pdfIn PDF document text
    • https://darenufu.weebly.com/uploads/1/3/1/4/131438483/finik_nuvododafagugev_jotola_nenexoduz.pdfIn PDF document text
    • https://sutukedepebovi.weebly.com/uploads/1/3/4/7/134753024/kiwexafa.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/67369566093.pdfIn PDF document text
    • https://werobezukivipa.weebly.com/uploads/1/3/4/3/134337965/lesobitageti-jawolur-bupig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://merovuditipin.onlinewebshop.net/rovalogenamowixini.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/zusedezi.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/best_top_load_washer_2018_consumer_reports.pdfIn PDF document text
    • https://729282ec-1290-4cbc-9302-cf8a24acd4c7.filesusr.com/ugd/42c189_b4a7ae09df624c338610c8c83b5209e2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fc8d05b-fc55-4e65-ac97-77a6b9f729ac/what_did_the_constitution_of_the_united_states_of_america_do_brainly.pdfIn PDF document text
    • https://5ac9d038-517d-4536-97f6-676423289421.filesusr.com/ugd/b444d4_538e32e38f32446e9d4fb036a56cc62e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2382acb4-ea03-4045-ac13-d5260e7ab098/kokesenulujavevaloruju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ef014e9-c6c3-42c6-a954-2a8a7398805d/how_to_run_a_grief_group.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67f2b89d-0aed-4498-a914-dd97481689fa/netgear_wnr3500l_specifications.pdfIn PDF document text
    • https://4b3b4da4-1145-40fd-8a04-0ac29766dab0.filesusr.com/ugd/6c6203_59446bc27e5e4593a908928643e1592c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/68fcb22a-e71f-4de9-a6d1-fa21eef79bbe/pizilebumuzepusomod.pdfIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_e9620aa07ac5446db3080763f087a47e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jinabisura/62279972957.pdfIn PDF document text
    • https://37976aa0-f55f-47d3-847a-8d185b13ebf6.filesusr.com/ugd/1d6212_b3bdc39b2cef448ab303ece18e35da06.pdf?index=trueIn 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_off0000faa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA1 5460 bytes
SHA-256: dc7dcd5c30dd9dd5c2d09a69e86f0be0e10bc9fd5891cd8a90efaf5945cd8e25
font_01_sfnt_off00010d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D27 11808 bytes
SHA-256: 8a3f95fdbe851b69114710aa8d0ff67a1257c964df3cec46a79f274869f507a6