Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f19a7afd9dcf8fb…

MALICIOUS

PDF

46.7 KB Created: 2020-11-08 06:24:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 3799a5a3fac3790e9ece36657b4f421b SHA-1: bfb4957ec5c56414c364bab0ffc6796f1f5d1fba SHA-256: 7f19a7afd9dcf8fb056df6c967924dbd2f94fc5b6d2b85bf3786fe0c88f4afb0
214 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://traffking.ru/123?keyword=kankuro+naruto+cosplay In PDF document text
    • https://kutusavirub.weebly.com/uploads/1/3/4/2/134265758/riponuvivad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/caf49680-5c63-4ef8-ac31-feba2a9fae63/femekesune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b28e2cf-8273-4019-9b63-a463530d7cf8/90274717103.pdfIn PDF document text
    • https://sudufafi.files.wordpress.com/2020/11/tixemefupezavub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79ac40df-9c88-472c-89bb-5e9792e125c9/furitolujodajagojomitad.pdfIn PDF document text
    • https://petivubeso.files.wordpress.com/2020/11/reluzedojumosewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef5b1c3f-250b-49a8-a2bc-3ce37e2cc737/budelagewalugipozivezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72493c6b-fb16-493e-bfce-24974cc5af9c/six_guns_apk_mod_download.pdfIn PDF document text
    • https://woxelowobabi.files.wordpress.com/2020/11/rajilida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1da6d6e6-52df-403c-af8e-e2f507eee84d/tozevoteposikusoxerija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be001bc7-3c3e-4b11-8f73-bff4e96df7ab/xapes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3ae0191-8aff-4f77-aafb-a87924329f37/4725955742.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C76 4776 bytes
SHA-256: 6526881a03c253e1a03095228a5817c54277ee36603dea32702a913fa6310e88
font_01_sfnt_off00007cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC3 10260 bytes
SHA-256: 4c25252e6216581c982815a204e4f42ab93b3cdd1fe543eedeb71d264f656d8b
font_02_sfnt_off00009faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FAA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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