Malicious PDF — malware analysis report

Static analysis result for SHA-256 d732286f39e4e95b…

MALICIOUS

PDF

70.5 KB Created: 2021-03-15 16:49:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0c18891df23d565332ee37ab8cc54266 SHA-1: d5aec69acb9646b542936a5a9cb710e842f7d84e SHA-256: d732286f39e4e95b10a35e81009d622eef358213efdf1c669477cea055bceb2c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to mall hours, aiming to trick users into clicking the malicious links.

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://vilenefex.ru/strik?utm_term=zara+walt+whitman+mall+hours PDF link annotation
    • http://sayfelengs.space/kasumevifgqzy.pdfIn PDF document text
    • http://yourbigdick.space/23351224600hedsk.pdfIn PDF document text
    • http://faceit.su/sulodawizoxunejelav366qe.pdfIn PDF document text
    • http://dezunanerab.iblogger.org/easd_guidelines_type_2_diabetes.pdfIn PDF document text
    • http://tigadugutuvatix.mygamesonline.org/betobubakifexibazaxopak.pdfIn PDF document text
    • http://wulixiv.sportsontheweb.net/geronimo_stilton_tv_series_episodes.pdfIn PDF document text
    • http://dombitarf.ru/699565015017ael9.pdfIn PDF document text
    • http://9gusevshop.space/root_browser_pro_apk_2018vme0g.pdfIn PDF document text
    • http://tonojodozif.mypressonline.com/transistor_amplifier_circuit_diagram.pdfIn PDF document text
    • http://lotemosunuw.iblogger.org/80450435877.pdfIn PDF document text
    • http://fastpeysistem.online/vukutumademi0hf3v.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/rebomedug/financial_reporting_and_analysis_chapter_5_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ff3cce6-56a9-40cd-adf7-6f4a3ecf8afb/harry_potter_complete_8-film_collection_blu-ray.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c0f89ca-7d5f-492c-a2b8-84a39dc8caf7/5874646747.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/website_templates_for_photography_free.pdfIn PDF document text
    • http://digupusulufo.epizy.com/63140432299.pdfIn PDF document text
    • http://wazubumuxige.rf.gd/68020539445.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/22901072405.pdfIn PDF document text
    • http://gujodupilewibo.epizy.com/leledemuseberij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ecb25c7-7f92-4513-aa9e-9f25d9cca10a/a_song_of_ice_and_fire_miniatures_game_review.pdfIn PDF document text
    • http://fajazimigig.atwebpages.com/pasiveta.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/best_keynote_templates.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_off0000d5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D7 4972 bytes
SHA-256: deb8bda2559ba3ea540372282387b1e0e6a54826f0bcf791d6680ec31e4e8baa
font_01_sfnt_off0000e6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A1 10720 bytes
SHA-256: c773fac887871232057142026b91df896f8111826a1d8f662e3b4d7b5dddb189

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