Malicious PDF — malware analysis report

Static analysis result for SHA-256 86c98f01f316c111…

MALICIOUS

PDF

73.2 KB Created: 2021-02-21 07:44:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9fe5d5dae4f15e29b09475bbff927887 SHA-1: 3ce3f78b8bc89a874b089be19052fff32c871ccc SHA-256: 86c98f01f316c1115da2c497a65d422dde2ca822e7c1739020ba5dd8a338775f
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-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://leonvi.ru/wix?keyword=what+do+pacific+tree+octopus+eat PDF link annotation
    • https://cdn.sqhk.co/xujurovemu/8njaPjh/rogue_legacy_xbox_one_review.pdfIn PDF document text
    • http://toteganutiv.66ghz.com/credentialing_specialist_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416806/normal_6023f52d3858b.pdfIn PDF document text
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/9815050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489993/normal_5fd6f9adea98f.pdfIn PDF document text
    • http://discovljzg.fun/salesforce_reports_and_dashboard_interview_questionszqvia.pdfIn PDF document text
    • http://freds.space/types_of_hemoglobinopathiestjz8u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450151/normal_5fd06631515aa.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/gHEmhdS/ahly_bank_exchange_rate.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444353/normal_6031290315828.pdfIn PDF document text
    • http://jushq.club/rutilezutudadema9jtn3.pdfIn PDF document text
    • https://fajesafopumusid.weebly.com/uploads/1/3/1/8/131871419/3683665.pdfIn PDF document text
    • http://italiahot.fun/the_giver_chapter_12_questions_and_answers21uq9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462708/normal_5ffd378da6b69.pdfIn PDF document text
    • http://stnold.com/998048147196utxw.pdfIn PDF document text
    • https://cdn.sqhk.co/nesadatifu/zQRIqjf/rufizawiput.pdfIn PDF document text
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/8423467.pdfIn PDF document text
    • http://zapatopi.net/treeoctopus/TheIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://karifopiti.epizy.com/19250780247.pdfIn PDF document text
    • http://kobezitidub.rf.gd/hunters_safety_course_test_answers.pdfIn PDF document text
    • http://tazuwaxerufuje.epizy.com/dakosafetazum.pdfIn PDF document text
    • http://larazegabolulaf.epizy.com/jusilomanuzexare.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_off0000e2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A4 5224 bytes
SHA-256: f43f0f74aea58ff2ba105a88134f7be7dbc0aa3331c48eee4d31afa8d02cebb2
font_01_sfnt_off0000f478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF478 10208 bytes
SHA-256: a4e28a9f9799e18a0fb2b8c13c270c45d3623391d21d3abdf1d2456e0c83a7e9

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