Malicious PDF — malware analysis report

Static analysis result for SHA-256 a763fb5d307487ec…

MALICIOUS

PDF

43.3 KB Created: 2020-10-15 09:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 669f6fd01a169eca0a709ee3b116c2d7 SHA-1: f446ce0076cdc2e27d9adab6c54852ff2463d843 SHA-256: a763fb5d307487ece6ac1558b9604866f52d8e65f34044bd40ce322053c7b7ee
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/pify?keyword=blood+vascular+system+of+herdmania+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f878cb4f1cf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f86f878c78d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f878c49ab7a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f8715642fe35.pdfIn PDF document text
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/4197128.pdfIn PDF document text
    • https://tudupumodowi.weebly.com/uploads/1/3/1/4/131406798/d2080fac38fbc08.pdfIn PDF document text
    • https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/babokura.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/769f5c9f-11fd-4dab-8d4f-5915b568c456/42062344880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42eabce8-a5d7-4c0a-b6d7-90923549b4b8/kububixavatitumiwivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b6af542-246a-486b-aa32-5c9b2780157f/xajevotijamimemadot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34ff2976-1b34-457c-beb1-532a92217502/rirefivuvotuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1920/4765/files/28036336466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/92369833358.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4100/4954/files/mosejuxazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8586/6167/files/zatosorikimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3789/1480/files/jaxixawixasuneronaluf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1275/8963/files/fallout_tale_of_two_wastelands_alternate_start.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2683/1784/files/schumacher_speedcharge_1.5_amp_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6872/6171/files/47129957801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7207/5414/files/35413077887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/9368/7965/files/88726629750.pdfIn PDF document text
    • https://medlineplus.gov/vasculardiseases.htmlIn 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_off00006a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A03 5608 bytes
SHA-256: bba24c213ed178ede7cd5c3c8653165a38017c55e90e41c8206118f0a9d85f60
font_01_sfnt_off00007cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFE 10408 bytes
SHA-256: 7ca966e29442e80465a49d0ae142e912ec1ede18f884545b9ceb8506b51f0015