Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c6a13af5dc6a8e…

MALICIOUS

PDF

84.6 KB Created: 2021-05-06 20:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 033bf6c794b8350be8afdfa55a6a7d84 SHA-1: b5312764c47fb7d7fb5a5f229e96f15b3efcdf24 SHA-256: b0c6a13af5dc6a8e1cb7d62cf1b16835fc8133d79e3944f34f41786d6cd0266a
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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://jumiwimov.ru/strik?utm_term=toyota+camry+hybrid+price+2021 PDF link annotation
    • http://xiwakaravivomik.scienceontheweb.net/63654811681.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420237/normal_606518b07c4c3.pdfIn PDF document text
    • https://cdn.sqhk.co/detobero/90ghhi5/56999547090.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494431/normal_606b32fa62f64.pdfIn PDF document text
    • https://cdn.sqhk.co/fifenije/aELggfi/download_tiktok_cho_macbook.pdfIn PDF document text
    • https://cdn.sqhk.co/pamavunawi/ghhcJO4/84145660223.pdfIn PDF document text
    • http://kolegutoravi.mygamesonline.org/gukegoturuz.pdfIn PDF document text
    • http://investmag.org/9431637273464nbk.pdfIn PDF document text
    • http://kartaidatodemeleri.com/bissell_green_machine_instruction_manualajjxw.pdfIn PDF document text
    • http://babixuxuw.22web.org/padufinexidizumilolobubaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387218/normal_605719287da93.pdfIn PDF document text
    • http://xitaboketeloba.iblogger.org/pefasugulizixupodegefige.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/diamond_quest_don_t_rush_mod_apk_revdlk31mf.pdfIn PDF document text
    • http://greatmasters.biz/when_did_prison_overcrowding_beginzijz5.pdfIn PDF document text
    • http://minuette.me/414804715295mw77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382631/normal_603125bc73a12.pdfIn PDF document text
    • http://fuvagezilavez.mygamesonline.org/45169956385.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
    • http://risexogukif.rf.gd/fixigexixobev.pdfIn PDF document text
    • http://zegotora.rf.gd/exit_interview_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/421b9594-f805-40a6-abc9-597de037469c/trane_xe_1200_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63485396-a44e-4117-aa9b-143cac640698/21909977243.pdfIn PDF document text
    • http://dojafeduzig.myartsonline.com/75847972901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aafc81e0-0dee-419e-8ae2-c7812141c3e6/white_rodgers_1f78_thermostat_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3B 5300 bytes
SHA-256: 7aa904e7b6386512a575166ecc68c09a939425092b7390ac894c3b2a27c75af7
font_01_sfnt_off00011148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11148 10908 bytes
SHA-256: d6b09ae98de3e6d5fa4f710551add5379e83485c0512beff4c334cb6224ecbfa
font_02_sfnt_off000136a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A4 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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