Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02136a7deb0ddd2…

MALICIOUS

PDF

75.6 KB Created: 2021-04-16 22:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: da23f52a6892183b2f80fa41b8838f33 SHA-1: b670f1580caca40e190d32a4e70d3a156d9866ec SHA-256: d02136a7deb0ddd24cfe2da5bb35c573aecdabd5decf7999ab67046beae64dcd
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic indicating it's a phishing lure, specifically using an SEO redirector. The embedded URL, 'https://golowaki.ru/strik?utm_term=hoover+floormate+spinscrub+hard+floor+cleaner+parts', is presented as a search result for product parts, which is a common social engineering tactic to entice clicks. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the overall structure and URL suggest a phishing attempt.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://golowaki.ru/strik?utm_term=hoover+floormate+spinscrub+hard+floor+cleaner+parts PDF link annotation
    • http://suwefazimim.medianewsonline.com/30286451198.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/M53jiig/bulisi.pdfIn PDF document text
    • http://gepanukotex.getenjoyment.net/mathematics_book_for_class_8.pdfIn PDF document text
    • https://cdn.sqhk.co/sebazisop/iJtieid/33290228651.pdfIn PDF document text
    • https://cdn.sqhk.co/wanazofemuvu/hiYEjdj/inter_milan_match_report.pdfIn PDF document text
    • https://cdn.sqhk.co/kewukapugino/SAigioO/93064030416.pdfIn PDF document text
    • http://nakodinita.scienceontheweb.net/saxagorezogefusi.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/joterige/fekunasufuguwinu.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/jikasijemed.pdfIn PDF document text
    • http://futakanawus.onlinewebshop.net/how_to_make_your_hp_printer_print_in_black_only.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/advanced_java_programming_lecture_notes.pdfIn PDF document text
    • http://vibiwarufade.rf.gd/citizen_eco_drive_radio_controlled_world_time_price.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/apple_music_vs_spotify_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/fadofoxijafotapumane.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/weather_report_conyers_georgia.pdfIn PDF document text
    • http://tosodesuvivat.epizy.com/workout_log_template_google_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7e3ba68-e667-41a9-bb99-3d1a9f0d6a70/the_black_bow_jewelry_company_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/odia_movie_song_2018_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70da7872-ab25-4522-bd50-8cacbb34d59d/74225036873.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/30742208249.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_off0000e82c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82C 5556 bytes
SHA-256: bbb6e0aebb9bdfaf470fefb4b79b6c5d36e73aacbaa19dd38f8c768fd7e03981
font_01_sfnt_off0000fadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADF 11112 bytes
SHA-256: b86f7f2e46da2e2bef042e0ff83b495d4f48be6d4d8bc18f94d76a8545ac5f02

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