Malicious PDF — malware analysis report

Static analysis result for SHA-256 8de120277a5c9bf1…

MALICIOUS

PDF

72.3 KB Created: 2021-03-05 08:59:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 403babe391181f0bb7649249605ab4e1 SHA-1: 371d645eb651b78d1b3b011e9f78d8f3a761f7f6 SHA-256: 8de120277a5c9bf1ef2f843cf51d9bd80dede29c2b46cbec768b6806beb8fad9
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/wix?keyword=nier+automata+world+guide+illustration+art+book PDF link annotation
    • https://cdn.sqhk.co/menodotitit/jaiajdb/70875943278.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/cjciihf/xurugufimebolapajezeru.pdfIn PDF document text
    • http://circulshtangcalip.website/zudivojewonigemovuxigeohs7.pdfIn PDF document text
    • http://kersita.space/tosorelanevepajamcn1dg.pdfIn PDF document text
    • http://uscreditmonitoring.info/if_the_savior_stood_beside_me_piano_sheet_musicu6re7.pdfIn PDF document text
    • http://wirelessinfo.ru/88536491676pvox2.pdfIn PDF document text
    • https://cdn.sqhk.co/sadudolamom/jjgjidZ/3505034692.pdfIn PDF document text
    • https://cdn.sqhk.co/koletexun/aheghjb/roller_splat_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458848/normal_5fe940b05f702.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390660/normal_5ffd63cf0d264.pdfIn PDF document text
    • https://cdn.sqhk.co/suzironanes/wOSuigU/green_poop_baby_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/jofijoju/yhficHA/82574940227.pdfIn PDF document text
    • https://cdn.sqhk.co/fafegatoko/ahhgh7v/hits_1_song_list_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/mugukawi/gdozjhI/download_dungeon_madness_2_pc_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nunakixuma/tusupe.pdfIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_d686aea985204c6c8739f6c6135aa536.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sukedil/ap_biology_practice_test.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/bodine_elementary_school_uniform_colors.pdfIn PDF document text
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_ba335ecf51ab492188d922120a4b8683.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/arrest_report_los_angeles_county.pdfIn PDF document text
    • https://3633ae4e-9acc-45df-885e-1bfa1481cb44.filesusr.com/ugd/e73054_4d97394808364ccfb34015fd2386769b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD211 5292 bytes
SHA-256: cb881e53573689d0fd422ebc6f8a087f63bfd926af151b597e8dc4f66ece8b87
font_01_sfnt_off0000e40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40C 9752 bytes
SHA-256: 328698197bbcdd3301fb81bf6643f9ce496e76d3cf21dc2a4f4ec6e39225e418
font_02_sfnt_off00010586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10586 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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