Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f570b69510f414…

MALICIOUS

PDF

72.6 KB Created: 2021-03-15 12:25:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e704b63894b1e0db4bf06ec85d444397 SHA-1: 1434d59db08b4939a0d33f8c87cd0a6ee900dd8c SHA-256: 59f570b69510f41460b1477b6d14310d22814cb7dab79468ecee38e503c9984f
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Steal or Forge Credentials T1059.007 JavaScript

The PDF document impersonates Gmail, a critical brand, to lure users into clicking malicious links disguised as a CAPTCHA or download prompt. The document contains numerous external URIs, including one pointing to a redirector hosted on weebly.com, which likely leads to a credential harvesting page. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing and potentially trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://juzowesefuzifi.weebly.com/uploads/1/3/0/7/130775985/napofolabo.pdf.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nipisod.ru/award?keyword=rodak+hematology+pdf+free+download PDF link annotation
    • http://dkblogin-de.com/diablo_3_ps4_save_editor_2020cnqmw.pdfIn PDF document text
    • http://bachanalytics.com/95644144680r4qfi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426263/normal_5ff25724264e0.pdfIn PDF document text
    • http://susurrus.space/when_does_the_titans_curse_movie_come_outgrceg.pdfIn PDF document text
    • http://theboldpantsproject.com/3606620415ds9xc.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/tav_prasad_savaiye_fast.pdfIn PDF document text
    • http://raicen.com/vefabivatugibipd1c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489058/normal_600dfc2336381.pdfIn PDF document text
    • http://theplafond.xyz/xitidogewijob0472.pdfIn PDF document text
    • https://juzowesefuzifi.weebly.com/uploads/1/3/0/7/130775985/napofolabo.pdfIn PDF document text
    • http://help-ruleviolation.com/bukunfezti.pdfIn PDF document text
    • http://belkwigs.com/college_rankings_world_reportj5tbw.pdfIn PDF document text
    • http://onatural.space/nejikupuzorokefakipunemaiwvme.pdfIn PDF document text
    • https://maladekokox.weebly.com/uploads/1/3/4/7/134745457/rexegev-modoxoboju-tevawusomob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409604/normal_5ff4c6bba2f3d.pdfIn PDF document text
    • https://viwoseloza.weebly.com/uploads/1/3/4/8/134861971/a700144afc368.pdfIn PDF document text
    • http://wapadax.scienceontheweb.net/best_animal_encyclopedia_2020.pdfIn PDF document text
    • http://vipimuxatomefi.medianewsonline.com/sun_tzu_art_of_war_quotes_leadership.pdfIn PDF document text
    • http://remont-pc.website/leneselifamlq0vv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xesepodine.rf.gd/tamavovedaterike.pdfIn PDF document text
    • http://delisomujiroma.epizy.com/87909920905.pdfIn PDF document text
    • http://tufobiwileke.rf.gd/seriloxazazedididoviwe.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_off0000d9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DF 5544 bytes
SHA-256: 09200b65002d9e5d2ef4b3fb61ea9b1c0f6f34db0c7650d40fc77af87fbb3371
font_01_sfnt_off0000ecb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB7 11372 bytes
SHA-256: 6a15ecb109962c17e6353ae4ec1fee2f92523a21d51224708fa1cbcc2c400347

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