Malicious PDF — malware analysis report

Static analysis result for SHA-256 348b4db72898f111…

MALICIOUS

PDF

68.4 KB Created: 2020-10-11 08:47:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 068a45420aeeeaa603a56f61ddad5e0d SHA-1: 603d864470f53df2bac8c628f24d4cc27ccd9ea5 SHA-256: 348b4db72898f1115ed2a1a470cfde125b58f1e18b26478fb9b4595de63b233d
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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/strik?keyword=psychology+for+dummies+free+download In PDF document text
    • http://wazoguke.friendsofcountry.org/uploads/1/3/1/6/131606739/nazazut-bifuloxatuf-monizupupuse-gunefubikozuxeb.pdfIn PDF document text
    • http://files.catherinebaileyphotography.com/uploads/1/3/1/8/131856042/267349.pdfIn PDF document text
    • http://files.paintlifelaughing.ca/uploads/1/3/0/7/130776591/4f425f116b7.pdfIn PDF document text
    • http://files.tigrecolorado.com/uploads/1/3/2/6/132681296/tinexumisisi.pdfIn PDF document text
    • http://wozuv.annikascaketutorials.com/uploads/1/3/0/9/130969430/64e0d7b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/49e12d53-093f-4caf-b931-ec72a889c41d/71931048451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05d4d57e-dec8-4615-bc0b-1783d5af3dc0/98295466749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2156f66-d481-41af-8ed1-e7b0308081e0/kunovufino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a731c7b9-ef4b-4905-9e7e-3654440e4550/43863583312.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02d952d1-af90-49a7-b89b-55cd4a37a940/76952247461.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5c3372b-2a33-4579-837e-9a64fdb62ffa/32963283740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68eede25-70b5-48ac-85d7-c8841fce76c0/pofefuxavuxuruwepasofapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d2d5896-d0fa-482f-bc6a-cffadad949f7/vudenapuzal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/95603665152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6734/1974/files/bold_strategy_cotton_meme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9632/1432/files/15098517323.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_off0000ce8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8D 5632 bytes
SHA-256: 72eb2817fce7708880189935e66eb2d0dfa0dd4b4abb3d616f20a0a3c117c991
font_01_sfnt_off0000e193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE193 10120 bytes
SHA-256: e1720392483ebfce6df68e058de3ab58b4593ca573edf10b59724e65c584270c

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