Malicious PDF — malware analysis report

Static analysis result for SHA-256 624aa8acfced3cf7…

MALICIOUS

PDF

81.5 KB Created: 2020-11-25 18:43:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-29
MD5: 2eec5b8e00ae859164882a8b827b81e3 SHA-1: 4d332c1fe856ceee258f2c7e5bca7f13366808d1 SHA-256: 624aa8acfced3cf7a8cf022c0153f15c47ef590d5288b1e381feaf66e0b3d393
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=abstract+algebra+herstein+3rd+edition+solutions+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388612/normal_5fa692209dfd0.pdfIn PDF document text
    • https://kimiragijasem.weebly.com/uploads/1/3/4/0/134096233/wenixiximirop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c74c60a0-063b-4ff8-9c29-64dac62e0fcd/integral_por_sustitucion_trigonometrica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4d5bfa6-cb91-4566-89db-908ee3574550/vewov.pdfIn PDF document text
    • https://s3.amazonaws.com/befevifa/volokikilej.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/zejomefetizozaf.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/bloody_mary_2006_tamil_dubbed_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/sight_and_sound_donation_request.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0449c1d-53c2-407c-aeb6-3a9f4adf8234/mitelepovazam.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/2_player_games_online_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad48103c-f99a-4a70-8a49-9855c735d94e/free_christmas_card_making_s.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/muzowis.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B9 5592 bytes
SHA-256: d5b3eb86d60ce26b0cfbc473e2c8c727934100f37d1803857f243251cb86c5ed
font_01_sfnt_off0000dc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9F 17644 bytes
SHA-256: c3ac9aba25f64327a7df86ebc144eb222d10e7a574ee7e826a84dc0ccb551b2b
font_02_sfnt_off0001141f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141F 16472 bytes
SHA-256: 3343b266faa1eb1aadff75a60408cca82abf9a8da0f5aa80ef3b143354d72884
font_03_sfnt_off00012a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A93 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3