Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde96a9dc9479615…

MALICIOUS

PDF

71.8 KB Created: 2021-02-20 18:39:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e28d51325d59da418306af4daf1c6062 SHA-1: ccde48d32ed6558963930e8fb4012c23d32a7d56 SHA-256: bde96a9dc947961591b6460a09dd9a88ed071b32c895d202d143406973679e7c
254 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to redirectors and SEO link farms, indicating a phishing or malware distribution attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly suggest malicious intent. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the structure and embedded links are indicative of a malicious document designed to trick users into navigating to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/123?utm_term=latin+for+dummies In PDF document text
    • https://liwarelavoz.weebly.com/uploads/1/3/5/3/135398493/dezojivodibekuw.pdfIn PDF document text
    • https://cdn.sqhk.co/litawoxelida/Rhhijau/photo_warp_app_apple.pdfIn PDF document text
    • http://befomibaxizep.iblogger.org/gulekijumus.pdfIn PDF document text
    • https://tosofovopige.weebly.com/uploads/1/3/3/9/133998067/59e85309.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/qm3jfXF/stickman_superhero_shadow_fighting_game_apk.pdfIn PDF document text
    • https://gopogaxewose.weebly.com/uploads/1/3/4/0/134013169/sesuwi.pdfIn PDF document text
    • http://serikanipesemo.iblogger.org/ecosystems_and_biomes_worksheet_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/j6uz5p5/dizite.pdfIn PDF document text
    • https://xesofizagib.weebly.com/uploads/1/3/4/4/134491847/9812d72a4c752.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/legapatatezisa/toshiba_regza_lcd_colour_tv_32_inch.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/61323712500.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/transformation_horizontal_gene_transfer.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/wikamifuridedofusepexizil.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/ubuntu_14._04_2_lts_iso.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/lotoxarojov.pdfIn PDF document text
    • http://rawuwad.epizy.com/notavidavebukariliz.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE48 4964 bytes
SHA-256: e93d7780e004bf77ba5bb50e61a7bffa8335d30e0b1c59a101a8454c252c6dfb
font_01_sfnt_off0000ef1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1A 10480 bytes
SHA-256: 9729a7ac3314d513866f98fb50241415e53e9ad1a0a2b03e3fe9b638cc6488ac

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