Malicious PDF — malware analysis report

Static analysis result for SHA-256 6004ad54fb6540b2…

MALICIOUS

PDF

81.4 KB Created: 2021-03-04 14:09:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e6f987d4ceb2c616d7f91e6ad172d265 SHA-1: df4a814aec969fd1cc6371d8a460c658b62ad5b2 SHA-256: 6004ad54fb6540b2eef31c6960a4aae959899620303d185fd26c0cf3b102c96d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a malicious link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a secondary payload. The document body, though heavily obfuscated, contains text related to a 'rave speaker disassembly' which serves as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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/strik?utm_term=hmdx+rave+speaker+disassembly PDF link annotation
    • http://nepatokada.mypressonline.com/easy_crochet_blanket_tutorial_left_handed.pdfIn PDF document text
    • http://parrrtner.xyz/explosive_child_ross_greenecpbzf.pdfIn PDF document text
    • http://roman-holidays.shop/sidofasixelejomew3de67.pdfIn PDF document text
    • http://216tilford.com/how_to_unlock_frigidaire_stackable_washer90qr9.pdfIn PDF document text
    • https://petomikerip.weebly.com/uploads/1/3/2/3/132303099/2791852.pdfIn PDF document text
    • https://mekapejodefab.weebly.com/uploads/1/3/4/7/134740006/1746767.pdfIn PDF document text
    • https://moxuranib.weebly.com/uploads/1/3/4/3/134345095/misofumepokuxi_rovej.pdfIn PDF document text
    • http://wodekenizowa.getenjoyment.net/lupewi.pdfIn PDF document text
    • https://nemotepazifoki.weebly.com/uploads/1/3/0/8/130814284/1d3807b8445a.pdfIn PDF document text
    • http://it50save.info/mentalist_season_3_episode_2418wb5.pdfIn PDF document text
    • http://zunololanuxigu.sportsontheweb.net/what_does_pals_certification_stand_for.pdfIn PDF document text
    • http://bubble1.space/playerunknown_s_battlegrounds_license_key._txt_freexu4dj.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/452923692106mloq.pdfIn PDF document text
    • http://wiregabjuk.fun/5952133493360o1t.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/mitimaxavenuzosisiba.pdfIn PDF document text
    • http://sodaapp.club/660561237241yjbz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_17520b40422c40ef8c3521ddb1b55d72.pdf?index=trueIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_cc9bb2fc12ec4d54a8c2a48e3a14c281.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/01420494-6680-4d1b-935d-18422bca45ef/dukomuwusujosot.pdfIn PDF document text
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_cac75a0c27a64af5862f73aaac2be462.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f401172-3f81-4502-9f03-97f091c5d23e/dotudiduzexosusul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c582813-fefc-46c0-9831-101093ef047b/51956649637.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/harry_potter_and_the_philosophers_stone_netflix_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de76aadb-5ecd-4d7a-aaec-a2eb7493fd43/how_to_fix_leaking_washer_drain_hose.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_off0000fd5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5B 5500 bytes
SHA-256: f497e97e4819c1b353954d71c10512a3040ab41358d8dc9a830f0002bd190843
font_01_sfnt_off00010ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFB 12092 bytes
SHA-256: 401e29223695afa6551ef0141fa33dcd6110f15a16046a6708c0c07933e4fd1d