Malicious PDF — malware analysis report

Static analysis result for SHA-256 be97451792952667…

MALICIOUS

PDF

76.7 KB Created: 2021-03-01 02:37:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8152542be0f21d3ca1939914534a7ed8 SHA-1: a5f46d2e6d13b826a128eb06b1dfec112239f4cf SHA-256: be9745179295266760792c49dfca8374ee5932c6e6838e74ff8dc9a148ba3166
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 0.9998

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://jumiwimov.ru/wix?keyword=eliz+keto+ingredients PDF link annotation
    • http://xemopubuga.iblogger.org/basic_event_planner_contract_template.pdfIn PDF document text
    • https://buserakufazuwus.weebly.com/uploads/1/3/4/0/134097478/ceea0d3f12239.pdfIn PDF document text
    • http://giduwudiz.iblogger.org/how_to_check_transmission_when_buying_used_car.pdfIn PDF document text
    • https://wamonudikiso.weebly.com/uploads/1/3/0/7/130776885/9067458.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/how_to_make_an_interior_design_layout.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/gfgjHLk/fire_tv_universal_remote_android_tv_kodi_cetusplay.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/jc7hgAQ/61504811067.pdfIn PDF document text
    • http://gokutep.22web.org/98038820775.pdfIn PDF document text
    • https://cdn.sqhk.co/vevajewez/gbNuUGm/burger_time_game_app.pdfIn PDF document text
    • http://polobasopika.mywebcommunity.org/blood_type_b_diet_food_list_to_lose_weight.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/what_is_the_date_today_in_julian_calendar.pdfIn PDF document text
    • http://tufodudem.mypressonline.com/boy_scouts_popcorn_order_form_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nizizebubo.epizy.com/devlin_hodges_scouting_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/nakupupifawetuwazupizaju.pdfIn PDF document text
    • http://wokoxut.epizy.com/99379607312.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/90849378894.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_off0000f132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF132 4852 bytes
SHA-256: ac197c9d637dc148c294336b18d388de6dda3f8a562bb1c2ddedba90322cecb8
font_01_sfnt_off000101d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D3 10564 bytes
SHA-256: e1dd18f5234136b1ced927f544af55339eff5c619e18a1183e72924848cca6cc