Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d2f2c27011de41…

MALICIOUS

PDF

37.6 KB Created: 2020-11-08 11:18:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 3d344a4a146d0fdc2f36264759e88f94 SHA-1: 38c177626425a26e85af6dbf4cb41d95f0d966f0 SHA-256: 86d2f2c27011de412e816d8c0c95a8e1f94eeeac10395814f34ea376086d20f3
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://traffmen.ru/aws?keyword=download+bbc+iplayer+app+for+windows In PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/waxojug.pdfIn PDF document text
    • https://mebavowu.weebly.com/uploads/1/3/4/3/134353315/efa27.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/f959c7ab-5d95-4c8e-af66-60f5f7393a05/school_uniforms_and_individuality.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/855703d7-37cb-4d3d-8ba4-f087ba7130d9/kuribobovo.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/49281005863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4debba7-e32d-4d17-b9e2-14181f9d7d88/87220087635.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/wuzazumikeg.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/volutekupifu.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/taforokagadebezutikugusef.pdfIn PDF document text
    • https://monobadad.files.wordpress.com/2020/11/ielts_speaking_cue_cards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/990ae6ea-4129-425f-910a-6d01990e8f19/destiny_2_character_creation.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/zipiwelefivugaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3118f04a-0b04-46f3-b1b3-a09a24357722/83658569535.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_off000051bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51BB 5480 bytes
SHA-256: 3b60d027e85741060c242a495f5a47342c3a565f84ddddc7c159474b7b00cec3
font_01_sfnt_off00006486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6486 10808 bytes
SHA-256: 43d6af9d35e46aa8bcf4ff133b2b1f4e6f1425188a7dff8e185b55453bbda2dc