Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0f35c4704d6c36…

MALICIOUS

PDF

47.4 KB Created: 2020-11-05 22:23:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a444b72e3fc1b6c814362196056f07d1 SHA-1: 5f790a201df4f56aae11861bc68e32671361e67e SHA-256: 3f0f35c4704d6c36dabea3e6ffab462a393b85833b23979305f99c75329addf1
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/123?keyword=oil+filter+sizing In PDF document text
    • https://cdn-cms.f-static.net/uploads/4447464/normal_5fa14d35a1581.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404293/normal_5f91e965bc929.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://s3.amazonaws.com/xojafemori/avast_pro_antivirus_activation_code_till_2038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9387603b-a05e-4c87-9f51-9d7fef2ede5c/jugaradojiromu.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/kinalunakopexuleji.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/jar_jar_binks_funny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c77fba7-6190-4413-96c8-a8f3b375f71e/3700809826.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/tixozozuvigedov.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/91748532714.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/19716192672.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/xekuxivuxosagalarado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7f27afd-3df4-461f-80c6-5c755142c754/organization_of_the_nervous_system_worksheet_answers.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_off00006fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC2 4480 bytes
SHA-256: 9f65418b42cda56e47865a2cad43cf9d4ace2e22e6b3a8d87c380475cf6f7cec
font_01_sfnt_off00007f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F09 10640 bytes
SHA-256: 0b304c44c8c3243d2071396a79db9b7336d87601d4cd7f8e14bb77b3da4eba21
font_02_sfnt_off0000a346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA346 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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