Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab3f7a2d2d7a51e8…

MALICIOUS

PDF

72.6 KB Created: 2021-02-14 18:04:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 63756494e1372cca2137bbf8af095bc3 SHA-1: 04ddde86a04fdde30c80b3c4cd87beddb67eca22 SHA-256: ab3f7a2d2d7a51e84baf8db9b71980ace7848e6490be73b23b1a96350c43145a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/wix?keyword=along+for+the+ride+sarah+dessen+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/laripikiwafo/jbfyFhg/viluve.pdfIn PDF document text
    • https://cdn.sqhk.co/tosuwukiwate/IeEghgi/barber_cut_lite_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/skjfghJ/how_to_draw_a_3d_tennis_ball.pdfIn PDF document text
    • https://xugowapowafav.weebly.com/uploads/1/3/0/7/130775127/ab98661d1.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/jhgjgne/valve_body_rebuild_cost.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/iagekie/smile_life_is_beautiful_quotes_images.pdfIn PDF document text
    • http://btsworld.org/4342395004sxp6a.pdfIn PDF document text
    • http://demask.space/52659715464lgndo.pdfIn PDF document text
    • http://dreabling.online/monutubisrcgpx.pdfIn PDF document text
    • https://cdn.sqhk.co/lepagesali/giggi84/diskdigger_photo_recovery_apk_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/wefopijupe/8beN9gh/91501701362.pdfIn PDF document text
    • http://copalofa.site/powafelixeroxopqxp73.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/fajonubinomeder/93569572259.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/95512270009.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/3381296953.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/tubapunabesibe.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_off0000dfeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEB 5384 bytes
SHA-256: 38bea55d81dac8c745a0a5224c1363383e69a600819d67ac325bb4102240dc63
font_01_sfnt_off0000f24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24A 10268 bytes
SHA-256: 0b47a7128c0ca7f6471a4b0037ed303a7f34e3880c22900286245db15644c37c