Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f06c274035b9f5a…

MALICIOUS

PDF

50.8 KB Created: 2020-11-05 22:14:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: bfb8a4b951fc1c0385b95ffe8ea46247 SHA-1: 45a2c483999cf2223b2b978cefa0139b6cf8fa18 SHA-256: 0f06c274035b9f5a1d35fc72370f8c2998f9b6a5f9aa1bdbae31b26699ccba5c
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://traffking.ru/strik?keyword=duck+life+4+on+mobile In PDF document text
    • https://cdn-cms.f-static.net/uploads/4459318/normal_5fa2d51beef16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392472/normal_5f99045d3b5f6.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/dcf49596-1219-47a9-ac86-e5494a863efc/30387772747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/560240cc-7c0e-46a7-80eb-ca78a4b0bf77/34661909724.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/2276115511.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9901/1738/files/hunter_x_hunter_2011_ost_3_-_riot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/385a822e-dd1e-495c-a399-ba0c3ed679bf/29945628101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2debbf10-111e-42a8-bd5f-bfbb276a8e25/62330939931.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd4dc9aa-c38b-40b6-9cab-2cb8d74ca5e8/90301671683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/592165c3-ecae-4075-b32f-74d2d8978942/97228859521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dde8e6c-3f89-49cf-abdd-30fe639e4390/xazimixidoxezasug.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/36190846488.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3310eb82-1b73-4b89-8afb-bd5b1fd73eab/wamume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67f088da-833b-4bea-8ae4-98400a942bfc/shadow_priest_pvp.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68C1 4832 bytes
SHA-256: d2bb73a355652b411e34617fb1420324b32553d7575f7ecb8291d9f04b753946
font_01_sfnt_off00007930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7930 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off000081be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81BE 10904 bytes
SHA-256: 38b084538e7969f94e0b5a38c82363d1c7e12a27c48d6c3ca1aa4450eef53b7e
font_03_sfnt_off0000a691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA691 16764 bytes
SHA-256: a03099de31e3a61c604b135aba3eee69761c3c58ca6dd40853cbe9c38e3b18bb

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