Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd9778effbf6ab27…

MALICIOUS

PDF

69.7 KB Created: 2021-02-10 11:01:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5b61b3b5811a312b6faaaba35efdb42c SHA-1: 690de4c6ad399d1f055436b802f43a047c741e80 SHA-256: fd9778effbf6ab2729aadbafe3a2d6ec40b2590aa07996f8818edd9108693e42
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wb?keyword=scavenging%20in%202%20stroke%20engine%20pdf PDF link annotation
    • https://cdn.sqhk.co/zifiguwosu/ghCcThh/25358508550.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_600a7572173a1.pdfIn PDF document text
    • https://nasesugafod.weebly.com/uploads/1/3/5/3/135387958/fawajavawa_foledixegurix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393018/normal_5fe30c7e51da2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384461/normal_601514bb0ecf7.pdfIn PDF document text
    • https://nelemiken.weebly.com/uploads/1/3/4/7/134704654/tekivagava.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446285/normal_600b60cb12d4a.pdfIn PDF document text
    • https://gesogakit.weebly.com/uploads/1/3/4/5/134581759/c43e732f04681a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445869/normal_5fee3abacf6b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454819/normal_600feca0a4c82.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/yHifoih/zixinamopokilepifi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380214/normal_5fdb23491a6a2.pdfIn PDF document text
    • https://cdn.sqhk.co/vakiduju/iejetif/pexatugejomekigifam.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/pewibim/canon_canoscan_lide_210_software.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/cheque_leaf_format.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/kivujubabodepezupapo.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/angiotensina_funcion.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/domain_name_examples_answers.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_off0000d40e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40E 5648 bytes
SHA-256: 563b050d0da4c6d48a86acab8c452daca44d1bb75d0991d7f4532f62707e2c78
font_01_sfnt_off0000e770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE770 10016 bytes
SHA-256: d348aef2fb6c4444ba975429318baa7f3dcee05120b56b64c52a7a9b8d939981

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