Malicious PDF — malware analysis report

Static analysis result for SHA-256 75b5b811a011459b…

MALICIOUS

PDF

73.7 KB Created: 2021-04-20 08:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 539f17dad97567e4a5589225219d3eb9 SHA-1: 58ab552be19e16cbb1a41d61bdbbb7507279e3f7 SHA-256: 75b5b811a011459b51cec354d4452b7566fa00ad6fe14070cc54d5d7c939b361
126 Risk Score

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 0.9999

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://botokaw.ru/strik?utm_term=strong+concordance+83 PDF link annotation
    • https://cdn.sqhk.co/fudikuzi/SzjdghK/funny_cell_phone_ringtones.pdfIn PDF document text
    • http://gejejasofubi.mywebcommunity.org/35850635645.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/Coljfza/20686375296.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/e8Pgdgg/womevetonutap.pdfIn PDF document text
    • http://xekalabaxuv.medianewsonline.com/biotecnologa_en_la_industria_y_agricultura.pdfIn PDF document text
    • https://cdn.sqhk.co/wozejodes/TgfXhgq/basketball_3d_light.pdfIn PDF document text
    • http://pixujuxe.mypressonline.com/imperatives_exercises_for_beginners.pdfIn PDF document text
    • http://deviditiposu.iblogger.org/rativavosivurufomaxubuzo.pdfIn PDF document text
    • https://lanutitokoxoziv.weebly.com/uploads/1/3/4/0/134096970/bb1e3ae2aa29.pdfIn PDF document text
    • https://nugesipepisi.weebly.com/uploads/1/3/4/0/134042061/4e44bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://48e5b1ff-25fb-49a4-826b-3ad3f3a15688.filesusr.com/ugd/0d632a_251b13daf43c4a71bec052ec18642f4e.pdf?index=trueIn PDF document text
    • http://bulodagobudika.epizy.com/85760249829.pdfIn PDF document text
    • https://c38d9960-f3a4-46a0-b266-cfc7836dd0ed.filesusr.com/ugd/a8d9c8_0b5d7bc3ba0646f5bd10da7b27ba0491.pdf?index=trueIn PDF document text
    • http://seluxud.epizy.com/62918096020.pdfIn PDF document text
    • http://podozedomusajor.epizy.com/arabian_dance_clarinet_sheet_music.pdfIn PDF document text
    • https://8bd0dbf5-62e0-4684-a95a-1d9666dfa34a.filesusr.com/ugd/e71694_5211b810ad034405aa747866b3ebec17.pdf?index=trueIn PDF document text
    • http://jusudab.epizy.com/sediko.pdfIn PDF document text
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_2c3bf971ad1049d9bd31f9e0c8f81545.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE172 5356 bytes
SHA-256: ab0d988294348e0aac498ecd780b2608b8c50b8e4b66326892809f8493dddb3a
font_01_sfnt_off0000f3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B4 10848 bytes
SHA-256: fc99a80f3e278249e17952b457b507acf283cd7802f999245d44261873fc8639

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