Malicious PDF — malware analysis report

Static analysis result for SHA-256 6facf9cfc22e5b7c…

MALICIOUS

PDF

40.5 KB Created: 2020-09-29 23:43:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 00077a2ec55ff8a7c6e4bb75c0e92593 SHA-1: de05517fda37117479bd668f3001fab0fc72f6ee SHA-256: 6facf9cfc22e5b7c5352a690b594e1bb3504cc32e8bf4bd4492d46cf32915760
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://gettraff.ru/strik?keyword=adolescent+stage+pdf In PDF document text
    • https://site-1037048.mozfiles.com/files/1037048/10878896573.pdfIn PDF document text
    • https://site-1036996.mozfiles.com/files/1036996/wulebajatodebabew.pdfIn PDF document text
    • https://site-1036625.mozfiles.com/files/1036625/16005014278.pdfIn PDF document text
    • http://files.thefashionthrowaways.com/uploads/1/3/1/6/131637103/535245.pdfIn PDF document text
    • http://files.studioksandb.com/uploads/1/3/1/3/131398547/pesilemow.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/848f5e30-d636-4241-b85b-bb3705162c0d/joxudibifuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e508dd1-b930-4eb1-a987-6bb0accafe2d/49870795266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5adf4a37-ebee-4354-86ed-efcd15a8afa2/80559983702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85dd05df-910b-426a-8de6-855b7d2270ce/gisuzagal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cde0d788-d3d6-4adc-8c37-b2d21d176a9b/devolugugek.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_off000060a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A4 5216 bytes
SHA-256: 48dda7432d6113e28e237f96ac5d415f28815d7466041223183d797d77755b37
font_01_sfnt_off00007280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7280 10348 bytes
SHA-256: 25e2eb0fd94d4f67aa90eb4ef891f47881c10347572c2cbba16cf07615fa3e1a

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