Malicious PDF — malware analysis report

Static analysis result for SHA-256 4324510a5586f262…

MALICIOUS

PDF

125.5 KB Created: 2021-02-24 22:14:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4e7c739a56a22e291a438149f836237f SHA-1: be0dfb4bc8d0a4f53643075f1b186b75a0cd5817 SHA-256: 4324510a5586f26244d43c4bce43f2e97d03ed84badc219dc6927f1619d91d3a
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to SEO redirectors, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains references to 'Tom Clancy's Rainbow Six Siege', likely a lure to entice users to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • 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://bologen.ru/123?utm_term=tom+clancy%2527s+rainbow+six+siege+xbox+one+multiplayer PDF link annotation
    • https://jerupixudenaxi.weebly.com/uploads/1/3/1/4/131437293/juwinov_rogepuwu_bididunewo_mexolazi.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/my_smoke_detector_keeps_beeping_three_times.pdfIn PDF document text
    • http://taptopbot.com/blueprint_to_mass_phase_2ddzqz.pdfIn PDF document text
    • http://suzamajotibe.mywebcommunity.org/37014517854.pdfIn PDF document text
    • http://yildirimotobursa.com/tapanirt13w.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/historia_universal_in_english.pdfIn PDF document text
    • https://suzazega.weebly.com/uploads/1/3/4/4/134476369/fadiroja_kururigurepew.pdfIn PDF document text
    • https://sonolinezib.weebly.com/uploads/1/3/0/8/130874018/tuganemobavovu.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/87037839253.pdfIn PDF document text
    • http://ukranews.icu/refukuvisqp0et.pdfIn PDF document text
    • https://suzazega.weebly.com/uploads/1/3/4/4/134476369/ab5012.pdfIn PDF document text
    • http://prizinsta.site/how_to_reset_sound_on_samsung_tvgwqv8.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/sobaketemu/academic_performance_research.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/caperucita_roja_hermanos_grimm_original.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/bulandi_film_song.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/gmail_app_in_jio_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/email_template_for_business_free.pdfIn PDF document text
    • http://kepofif.onlinewebshop.net/70881459371.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/38750156746.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_off0001ae5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE5F 5636 bytes
SHA-256: c2968eed348cba4fae0b19934deef855776a034c01d82b9581309c16930d4667
font_01_sfnt_off0001c1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C1A0 11268 bytes
SHA-256: b81a17bbae03be0b6fca88b38deef85cae3160cd55145042c29c61bff29afff0

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