Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9e6bc3b6fcdfd46…

MALICIOUS

PDF

44.4 KB Created: 2020-10-13 00:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4bf18d2dcd1c55a3f54ce0503babcd25 SHA-1: 7918920a1836800677f0aec390f678497ae6479a SHA-256: f9e6bc3b6fcdfd4627bf45c6954bf2970f6c9922162fdb18de016d662e863fc0
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=honda+astrea+grand+engine+manual In PDF document text
    • http://files.jankapoor.com/uploads/1/3/0/7/130776580/nodipulepezoju_pizifi_pedop_dijoviwuxitiv.pdfIn PDF document text
    • http://files.allbookedup.ca/uploads/1/3/1/4/131452841/74725.pdfIn PDF document text
    • http://files.christysartspace.com/uploads/1/3/2/3/132303235/1057657.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/8ed4c91a-65d0-4a32-89e3-f54288a1bea8/lotunolaxirikemikidot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab9ada23-f47a-4f50-8884-842bac7d559d/labor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59db5f80-2903-44de-add8-6fb5e1ccebfe/86102946797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/198b6d9d-96b5-4a92-8a27-9beda5f28407/33657120312.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2b0420b-98be-4607-8488-72da6fb28f87/42935310945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6844b52-990b-44ca-80be-4820c0e48681/fasalidokameramuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49d95304-3d64-494a-8aa8-63da882121c6/58809654200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/634f340e-cba6-49d9-afac-0de735c7912a/nujupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de5a2acb-664d-4ff9-9328-c7183d4db1d3/menupunegedipiset.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6473/3079/files/10787276718.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/babejoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6534/2117/files/nebraska_state_bird_tree_and_flower.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_off000060ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60EA 5104 bytes
SHA-256: 4de8603b86575ed90e6b164c729a710523de142b4cd2a0ab33568517f1bb7240
font_01_sfnt_off0000722c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x722C 15496 bytes
SHA-256: 95b77715abc04ca15f349cf68a29dd6e6e31c19ed9038d70a910271c11ca999e

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