Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4932adfc46c75c4…

MALICIOUS

PDF

79.6 KB Created: 2021-06-09 00:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cfb097e04ea05541f6090da8b5564334 SHA-1: f34633ddf1226ab2a3bf203525ac7e2bc052bc84 SHA-256: f4932adfc46c75c402af8ece69f50e552dd6e6e4d5596ff74acefb6c4e408a57
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 0.9993

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://pistant.ru/pbw?utm_term=lego+jurassic+world+codes+ps4 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375525/normal_5fc825f6920fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451348/normal_5ff6604f855b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473030/normal_601540a71466d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420432/normal_606832a39a1c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485435/normal_60307a2206280.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409246/normal_5fd3b2e4e5caf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461250/normal_60433cebbf113.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420039/normal_606140f33caed.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
    • https://uploads.strikinglycdn.com/files/3ee851d4-09a5-417e-9c13-626d45159d7d/savika.pdfIn PDF document text
    • http://jivevisubido.pbworks.com/w/file/fetch/144597552/74135772440.pdfIn PDF document text
    • http://mikabipi.pbworks.com/w/file/fetch/144577959/81118985394.pdfIn PDF document text
    • http://mefijunov.pbworks.com/f/phone_brands_list_with_country.pdfIn PDF document text
    • http://nikekuva.pbworks.com/f/gonixib.pdfIn PDF document text
    • http://wuvebag.pbworks.com/f/xujivunow.pdfIn PDF document text
    • http://medodadepud.pbworks.com/w/file/fetch/144899724/giraguwowufawesarobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/734c497c-9c5f-45d2-8d38-268490ecc707/pavimawivarogexixir.pdfIn PDF document text
    • http://xetuduju.pbworks.com/w/file/fetch/144534654/devumigozebud.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/w/file/fetch/144427134/focusrite_scarlett_solo_3rd_gen_settings.pdfIn PDF document text
    • http://nigezid.pbworks.com/f/engcon_ec219_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15ee7462-e95a-465c-8f01-6e97a601addc/uk_tv_guide_app_for_firestick.pdfIn PDF document text
    • http://xojipoxar.pbworks.com/f/how_do_you_use_anglican_prayer_beads.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE074 3088 bytes
SHA-256: ec699af6de8e804703fe0e0b44d6cbefbd5885043673cb0a1be6702b4ed52325
font_01_sfnt_off0000eb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7B 5136 bytes
SHA-256: 1a5def0cfa64f982ccc1042f2981306bb3ebf66db71e87c7f0657134926d53c1
font_02_sfnt_off0000fd20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD20 10896 bytes
SHA-256: 35627e72df1dbb25783cdfafad3a9e0ca815ecfc198b03bd6d89f4073afddf2f
font_03_sfnt_off0001223e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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