Malicious PDF — malware analysis report

Static analysis result for SHA-256 736b1c8b80b6e442…

MALICIOUS

PDF

78.6 KB Created: 2021-03-17 20:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03fbe4df4b9b9a02baa7ee206b193b46 SHA-1: 6d390fe0793358d76dd11d5f881fa7167516e171 SHA-256: 736b1c8b80b6e44229b9494d5a10e11301cff974ebe955d93aafef86d23f3dd9
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs, with at least one, 'https://botokaw.ru/wix?keyword=thetruthspy+apk+android', flagged as potentially malicious. The PDF structure and embedded links suggest it is designed to lure users to external sites, likely for phishing or malware distribution, aligning with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/wix?keyword=thetruthspy+apk+android PDF link annotation
    • https://cdn.sqhk.co/nalomuxe/igjamjc/65525311408.pdfIn PDF document text
    • https://cdn.sqhk.co/remonupode/kic2hhi/crusaders_quest_mod_apk_4._22._01.pdfIn PDF document text
    • http://zitekimuzefovar.iblogger.org/ligofuvidu.pdfIn PDF document text
    • https://cdn.sqhk.co/wegodimumod/jbgcxH8/photoshoot_tumblr_pics.pdfIn PDF document text
    • https://cdn.sqhk.co/zativojor/hPXhjM3/sepitotute.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/cQiiXh0/create_your_own_joker_villains_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwuzasemifo/khvCbih/the_bounce_back_movie_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/kVPQoig/triad_battlestar_galactica.pdfIn PDF document text
    • http://didavixakodix.22web.org/xoritage.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/8064bd6d-a7a5-496d-aecc-0ca25d0f5617/the_mortal_instruments_city_of_fallen_angels_audiobook.pdfIn PDF document text
    • http://bitesokilok.epizy.com/toro_riding_mower_parts_list.pdfIn PDF document text
    • http://mabazekow.epizy.com/zavimila.pdfIn PDF document text
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_b9edd53824dd48bfbde169ad4b3eb150.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/726d5da5-f718-4e2b-a5ee-b79fe3e54802/62936921993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a309af38-af66-4d02-a47e-1ee12f7d3fda/nejefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dba391f6-6aec-45da-a494-041136e97486/how_to_use_a_innova_3020b_code_reader.pdfIn PDF document text
    • https://c09438b0-f1cf-4ade-afa2-d322e048c450.filesusr.com/ugd/313cc6_a0603665e0cc4e6e87d64b232d6fdde4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e11465cf-2d6a-4e06-87fe-dcd12a60d072/what_happened_in_act_2_of_macbeth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95fd7062-f7cb-4a77-8f5c-43399e0bc5ad/bayes_data_analysis.pdfIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_257fface04e64b0a9d77c51e2e1908f6.pdf?index=trueIn PDF document text
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_70dacd858c1b4c5a92eadc0a1b7bebe7.pdf?index=trueIn PDF document text
    • https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_941c1184de0b4e5aa609c5faf0bf4487.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_off0000f51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51C 5132 bytes
SHA-256: 1324d0c663e82817dca53d0c82f85ef981d82aa467d11e5301028a596bcfe83b
font_01_sfnt_off0001068e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068E 11656 bytes
SHA-256: 845154a7ee59eb60d8964370f60b093db5722c2764a039b05d67e100ceb59dc1