Malicious PDF — malware analysis report

Static analysis result for SHA-256 37f9eedd512cd1b9…

MALICIOUS

PDF

87.3 KB Created: 2021-03-25 12:05:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8ba6f9b7b25adff00ad56944e3ac0682 SHA-1: 16b3caa5e5bb9d0e0c4cba2e0aff1c7b0a284bf9 SHA-256: 37f9eedd512cd1b931d15654ae2f6fc30ff9d9dca1770e3c94f8b26a1b42abfe
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 0.9998

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://vilenefex.ru/wix?keyword=ffxiv+eclat+de+serpentine PDF link annotation
    • http://kpovli.ru/haier_air_conditioner_remote_control_replacement5njgf.pdfIn PDF document text
    • http://mbfsopg.com/jumping_the_broom_movie_plotmd2k6.pdfIn PDF document text
    • http://tronreserve.online/the_heroin_diariesgeboz.pdfIn PDF document text
    • https://zevijilutijeso.weebly.com/uploads/1/3/4/8/134850931/4931f356536.pdfIn PDF document text
    • https://kukasoxijosip.weebly.com/uploads/1/3/4/4/134431535/kibizi-vakejoloveta.pdfIn PDF document text
    • http://kyrgyztours.com/depebowetozev52vx.pdfIn PDF document text
    • https://nofefikow.weebly.com/uploads/1/3/4/5/134510094/jisofejike.pdfIn PDF document text
    • https://venevivoxeda.weebly.com/uploads/1/3/1/8/131857756/7131356.pdfIn PDF document text
    • http://autokenn.com/paxewidezakuxilifufatqu1at.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/gurowozenupifi/construction_material_business_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/97987232334.pdfIn PDF document text
    • http://xifupoxenopi.epizy.com/firefox_offline_windows_xp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06512002-67eb-4c07-aaad-4c5921b6d3c8/24813082360.pdfIn PDF document text
    • http://maladovefo.rf.gd/best_penny_stocks_for_2021.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/4144921125.pdfIn PDF document text
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_558a68aa8f374d68a4b9a88083a13f09.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed080520-5c4c-4efb-9843-5284705774b0/dupebolazetaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eca9bc2f-7209-4c03-a849-f38614f1a292/ruin_and_rising_wikipedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef61602f-bb5f-4e4f-ade2-ba0e6e2ac5a5/the_personal_mba_audiobook_full_in_hindi.pdfIn PDF document text
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_1b7195abcc064b6894adda6cd70b3253.pdf?index=trueIn 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_off000117a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A8 5232 bytes
SHA-256: 0cd985f6081cccb6796035bd89a97c046394c1d93f4860c2de56961d785d0511
font_01_sfnt_off00012995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12995 11472 bytes
SHA-256: f49c43f2d789dd4f7df517c241373717b7b302cc0043d14228bc0dd6c657e34c

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