Malicious PDF — malware analysis report

Static analysis result for SHA-256 92696503ef163518…

MALICIOUS

PDF

65.9 KB Created: 2021-03-29 20:49:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 58588108c15e97a6839274b7858833a8 SHA-1: 552dbe24f41f2f37303e4d4125eff896ba8fe4c4 SHA-256: 92696503ef16351818a8c2edab7edf61c36ec10cbf60710e65ec846ebe5871de
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 0.9997

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://resalured.ru/wix?keyword=worksheet+identifying+lab+equipment PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366408/normal_60248481515cc.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/Zhehdhh/rollercoaster_tycoon_4_mobile_scenario_17.pdfIn PDF document text
    • https://cdn.sqhk.co/vudupapuj/c6sPI8o/instagram_username_generator_for_business.pdfIn PDF document text
    • https://cdn.sqhk.co/kuniremolu/fSHxgin/8434841892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403129/normal_60547c06ad163.pdfIn PDF document text
    • http://pedumerik.sportsontheweb.net/71807794685.pdfIn PDF document text
    • https://cdn.sqhk.co/renosopezare/d4jcLW8/vopur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381297/normal_601334e1667f8.pdfIn PDF document text
    • https://cdn.sqhk.co/mezadisedud/gicg9ja/how_much_do_nasty_gal_returns_cost.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/RifY4jc/guxulozeje.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvurero/bBjchOB/kingdom_new_lands_knight_statue.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506063/normal_5fd9125998cea.pdfIn PDF document text
    • https://cdn.sqhk.co/tidilotofuka/hcj7Sgj/31012975895.pdfIn PDF document text
    • http://kodepovorivapi.mygamesonline.org/tedoked.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://futuwerelak.epizy.com/bumblebee_old_camaro_transformers_4.pdfIn PDF document text
    • http://makakanow.onlinewebshop.net/conduct_disorder_rating_scale.pdfIn PDF document text
    • http://vutifuluviti.epizy.com/descriptive_data_analysis_in_qualitative_research.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/63697418013.pdfIn PDF document text
    • http://zowolowoziru.rf.gd/57463468746.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/79632513537.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/videpure.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_off0000c41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC41B 5900 bytes
SHA-256: 0faae8e215ff3bea533049b54b92254093c03424e5d006b5932d1aa3a990d384
font_01_sfnt_off0000d814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD814 9960 bytes
SHA-256: f86a866662b396d1c8d0def442853fd16a9f0ec4941697053ee5d5d1a921b137

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