Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c14ba18529de4d…

MALICIOUS

PDF

67.5 KB Created: 2021-04-03 08:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f22ce793300fe83929a241e34a284d20 SHA-1: 14a26aca019e081f9eedd68f56a046bf499c4e64 SHA-256: b6c14ba18529de4d901cd0559204262be87701d9217806e1db270eedd7eec6ae
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://leonvi.ru/strik?utm_term=nail+shops+open+in+clinton+ms PDF link annotation
    • https://cdn.sqhk.co/goworonol/hcs84Qe/world_war_1_and_2_deaths.pdfIn PDF document text
    • https://cdn.sqhk.co/tavedikovo/Igfbkbv/temple_endless_jungle_run_oz_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/nosimasiv/jbHqic1/rotipuzibafesosesaketeno.pdfIn PDF document text
    • https://cdn.sqhk.co/tujarazimok/ibZSdsO/bagezidabokagumu.pdfIn PDF document text
    • http://tifusavegapawuf.mygamesonline.org/what_does_the_symbols_on_an_oven_mean.pdfIn PDF document text
    • https://cdn.sqhk.co/bimolixumotu/0FjfhiO/giwasewefefamasanasigizu.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/baxibegigokexanenaz.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/77792574693.pdfIn PDF document text
    • http://piriveva.scienceontheweb.net/badminton_official_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/bopelara/hcifeic/jidubavaguvi.pdfIn PDF document text
    • http://kixamugefuwa.22web.org/trigonometry_review_worksheet_answers_gina_wilson.pdfIn PDF document text
    • https://cdn.sqhk.co/lofesaxudiwo/jdDgNge/56681885487.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/tafogusegabomu/logitech_f710_controller.pdfIn PDF document text
    • http://poborunedajemo.onlinewebshop.net/87337008448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff8e8439-385c-499e-9ab3-0374ff821c73/how_many_pages_is_the_magic_mountain.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/how_did_alliances_start_ww1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/371dce08-198d-4979-9b9f-0bd02c3eca15/83268074815.pdfIn PDF document text
    • http://zesaxuxi.rf.gd/crack_ielts_in_a_flash_speaking_1.pdfIn PDF document text
    • http://nujokubape.epizy.com/95728220877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3df9125-dda1-4a0c-a486-bafaeb0105b7/doxegawogirusonizov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc7a12ed-0341-401c-a5cd-5d3a73abffe9/ampli_fender_mustang_ii_v2_110w.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_off0000cc33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC33 5044 bytes
SHA-256: 2607544854cfc969a2a52540059984e7676f2456ec18893f777537145b397d86
font_01_sfnt_off0000dd3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3D 10244 bytes
SHA-256: ded6ad72e4c93a3717bfee2c0cc02a9364b8d955bf32e521e3ce95d9b10be87e

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