Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ffd6208f1119b2…

MALICIOUS

PDF

75.1 KB Created: 2021-04-20 01:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b279e49514ada4dcf813eb9aaf038b35 SHA-1: 4612017a09c04aa1e23f8bf3dc21e022fc9a8b49 SHA-256: 63ffd6208f1119b220cbc9d42d613c636ac6556da5a380249aa1fad8ef9c7221
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that are part of a link farm, with several pointing to disposable hosting. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains text related to financial analyst salaries, suggesting a lure to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://baarspo.ru/strik?utm_term=what+is+the+average+salary+of+a+financial+analyst PDF link annotation
    • http://coins24h.com/la_leyenda_de_orfeo_y_eurdiceeint5.pdfIn PDF document text
    • http://stylecurtains.com/bakiriremadarajekih10h8.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://vexetifiridik.mypressonline.com/erp_business_case_example.pdfIn PDF document text
    • http://japancar-sib.ru/48_laws_of_power_free_download3jc9i.pdfIn PDF document text
    • http://prod-fruit.space/manosozofogonufovuzew1uck.pdfIn PDF document text
    • http://vovavipegum.getenjoyment.net/dokisitumokalojofapefun.pdfIn PDF document text
    • http://imedo.ru/le_petit_nicolas_englishdc19q.pdfIn PDF document text
    • http://fuzuwozozat.mypressonline.com/91274600656.pdfIn PDF document text
    • http://bufo.online/xenyx_x2442usb_manual_espaolv59am.pdfIn PDF document text
    • http://mignonette.space/996180168965rlga.pdfIn PDF document text
    • http://lienforkid.com/istikhara_dua_englishywvj9.pdfIn PDF document text
    • http://medazuxa.mywebcommunity.org/garmin_920xt_manual_portugues.pdfIn PDF document text
    • http://bufezipuduxev.mywebcommunity.org/marlin_336_big_loop_lever_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/cisco_linksys_e1500_router_login.pdfIn PDF document text
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_515d6d3bf45146ff983121c1bd163e5f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paropabaru/volubadegafifofadavi.pdfIn PDF document text
    • http://lawiferow.myartsonline.com/22366716086.pdfIn PDF document text
    • http://lawesiwewif.onlinewebshop.net/64040202725.pdfIn PDF document text
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_535e11c399b247cab937b174ea1471c5.pdf?index=trueIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_6ebe2bfa5e2e49e19f43101a2258407f.pdf?index=trueIn PDF document text
    • http://jomupaz.myartsonline.com/68379650263.pdfIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_21b19f223f1e4371adb4e65cd24f9cfc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/4484380541.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_off0000e627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE627 5320 bytes
SHA-256: 4450429212891aef59e6f4f80e14d60b1e476783d6c1846f79f62561a9b397cd
font_01_sfnt_off0000f853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF853 11212 bytes
SHA-256: cd0cfa325a52fc105eb43e21823f0daf085cbd3e00512d8e878892500dec824a

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