Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9b607811470ad75…

MALICIOUS

PDF

43.7 KB Created: 2020-10-03 15:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: fe50a9e42973b7212c074d79a92f08b9 SHA-1: 0148af45d3acde93d87fcd4e57ef90adf7816a5b SHA-256: c9b607811470ad75c764edf888155ccbfcd2bc85129eeeb091c8cb0a75242484
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://cctraff.ru/strik?keyword=dr+sebi+alkaline+food+guide+pdf In PDF document text
    • http://loduk.amandaelizabethinteriors.com/uploads/1/3/0/7/130738681/6466178.pdfIn PDF document text
    • http://visisop.blitzmarketingma.com/uploads/1/3/0/8/130874642/lokowirisojuxusofutu.pdfIn PDF document text
    • http://files.norcalsmartvestorpro.com/uploads/1/3/2/7/132710655/96f0fa3.pdfIn PDF document text
    • http://ladijulol.stpetersmorrison.com/uploads/1/3/2/3/132303189/kaserowovenagilek.pdfIn PDF document text
    • http://files.itsablessedlife.net/uploads/1/3/1/8/131871556/5890691.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9900/3811/files/jivizaxupafana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3562/1536/files/zizuragadorolefebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0431/3247/files/gilbert_de_venables_1st_baron_of_kinderton.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5639/4140/files/basic_probability_rules_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/910f7e2b-a530-4a32-a741-da05d0426be9/revosebafovurupok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b689652-01ae-47e5-b8ea-470149650f9f/92730907333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/640ca02d-f64f-4d1e-b61d-67c3febb0d61/15308261417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f5c0b13-453c-4414-8f98-8a99feb18936/diruvipu.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_off00006a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A13 5412 bytes
SHA-256: d846932ae3d763d124eb3da0914882f174d823dca1322af92b727bb94affe532
font_01_sfnt_off00007c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8C 10568 bytes
SHA-256: 099583bae8f9da8710a6e028db7e0f4afba8c411c7d2b4dfb9c947dd5b381dbd

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