Malicious PDF — malware analysis report

Static analysis result for SHA-256 4085da35fca3cade…

MALICIOUS

PDF

77.5 KB Created: 2021-05-08 02:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 755ac785cb8d8ad10405fb2a6a81b551 SHA-1: 58ff6808b14e947d65de3cb81d82a049666e94cf SHA-256: 4085da35fca3cadeab5c6846d31d93cb1e8ae05003ed49279607fc0ecfa29200
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and 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 0.9996

Heuristics 5

  • 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 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://midufefew.ru/strik?utm_term=the+laws+of+spirit+world+pdf PDF link annotation
    • https://cdn.sqhk.co/teforoke/6ihShhN/business_management_and_accounting_associate_degree.pdfIn PDF document text
    • http://scandisvet.ru/jensen_vx7020_firmware_downloadr5c1x.pdfIn PDF document text
    • https://cdn.sqhk.co/tajugajobib/gfMgegf/dora_saves_the_crystal_kingdom_wii.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450259/normal_5fe853699302c.pdfIn PDF document text
    • https://cdn.sqhk.co/sativomofij/im8ig60/443821653.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/ijipQig/lonutebavetemidubuji.pdfIn PDF document text
    • https://cdn.sqhk.co/mubogasaven/idEijie/hero_rescue_brain_quest_5.pdfIn PDF document text
    • http://idealica-itufficiale.website/587034530239sdyb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381756/normal_605c5b214cd4f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376879/normal_5ff36b8f349af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_6029c2bb7eb6c.pdfIn PDF document text
    • http://sq11mini.com/364786083213b4jg.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/jejixgh/97829085158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473056/normal_60179b5c4d5fa.pdfIn PDF document text
    • http://barberking.best/61076495390lgeqc.pdfIn PDF document text
    • https://cdn.sqhk.co/nawamuzimosu/hchegi1/menu_card_design_software.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457849/normal_604b4e947e981.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413226/normal_5fed0d248ce08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377414/normal_604d2ca0356bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482218/normal_603bf8f7417db.pdfIn PDF document text
    • http://triple-doska6.club/aprendizagem_organizacional_e_educao31ym6.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://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_off0000e1fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FE 4852 bytes
SHA-256: 59931fd097a857b0e1db852d600e39a25bba9d4c1ec972b0fb8e39189b832cf1
font_01_sfnt_off0000f2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A7 12008 bytes
SHA-256: 8b677bca5c7220cf966e4509fd7cbf6ced1e904bf13bd580deb6b8c69ee75918
font_02_sfnt_off00011ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB2 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

Open this report in the interactive analyzer, or submit your own file for analysis.