Malicious PDF — malware analysis report

Static analysis result for SHA-256 984c26cfbeccf45a…

MALICIOUS

PDF

45.7 KB Created: 2020-10-11 19:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: e0fdb0505ba2d21b257c3528acca68f0 SHA-1: 75c91aac7871330e34b1423578198af34deb4d11 SHA-256: 984c26cfbeccf45a3c5e6f29f3ae11ebc38d006dd212d0c8c95a0dd2643fdba4
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=dragon+coloring+pages In PDF document text
    • http://gofajol.kathypoelker.com/uploads/1/3/1/3/131379856/gabukizepowowuram.pdfIn PDF document text
    • http://tarifi.driverightiowa.com/uploads/1/3/2/7/132740327/dofefinizut.pdfIn PDF document text
    • http://files.mrricksable.com/uploads/1/3/0/9/130969522/c31e735d499b.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/32ce120d-891f-4877-8eb8-bd4902679955/sozunofobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb601683-b7b1-4f02-a5bd-894862316c93/wexukorimewuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a063a69-2dbf-4f89-9bda-5b2ffed405af/57968263034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72a4d53b-83f0-409d-99ee-d6b7c5e36078/kajiwonilejugarojid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d852122f-f919-4b27-9df3-02d7b5065eea/ragimosoketawozazedop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2319/0181/files/sewuxudemepedizofijimisan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3674/0264/files/68225533473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7171/5993/files/bikanolujizikizuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7623/2387/files/rebujotabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7800/6437/files/43815914505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60984079-a7d5-4d91-bf86-f36d420029b3/39509883030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3645e387-fb73-4a26-81c0-254efc1216b3/6507317902.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75233eeb-a097-48f4-a83a-3cd7aca27533/38615187817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3376dca8-0bd8-47f0-a19f-f8990d0c0a9d/ganimonulopukokabofuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6e1354c-cfc2-4ccd-811b-4558c6f885ee/52114280895.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 4

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_off000075fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75FC 5100 bytes
SHA-256: 11d539e8cccdd5506c699657411a51e42a06f6bd58af67ca9b86139ac729d292
font_01_sfnt_off00008763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8763 10020 bytes
SHA-256: 7def555c15d3d480ae87f927c8b49605660d3f06dbdab098bf90338660f8d2f4

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