Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0553f479ff8e769…

MALICIOUS

PDF

49.3 KB Created: 2020-11-07 20:03:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 7026784c22c860ff68dc71bbba28be97 SHA-1: 7efb48fa5f009da12a4d5452eaeb6f50dca8822e SHA-256: c0553f479ff8e76968a1d37052d4a5b042217fefe7e3f1c39ba60d549d1b11d9
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://traffmen.ru/123?keyword=seth+thomas+grandfather+clocks+1980 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5f876699c9f72.pdfIn PDF document text
    • https://jijajaxasivezix.weebly.com/uploads/1/3/4/5/134588510/vewukikitit_mesape.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/zisutolavuguve_nikufuwokupo_natosezaforeri.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tuzamada/osrs_family_crest_guide.pdfIn PDF document text
    • https://fufevagopudi.files.wordpress.com/2020/11/56177366567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1c293b3-2251-4010-850e-e96d1a03e485/75421341187.pdfIn PDF document text
    • https://s3.amazonaws.com/dirijazi/auglaize_county_auditor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10c19246-7d28-48ff-907f-2153fa9864d9/61031271114.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/flvs_algebra_2_module_1_dba.pdfIn PDF document text
    • https://jagobexirug.files.wordpress.com/2020/11/the_jolly_hunter_lotro.pdfIn PDF document text
    • https://pevimuve.files.wordpress.com/2020/11/charged_capacitor_and_resistor_mastering_physics.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/pofovobiwopulawalis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/161ba418-c437-4ffd-acf1-b51bd35b68c6/55597996729.pdfIn PDF document text
    • https://zedapakaxivi.files.wordpress.com/2020/11/d-link_dwr-921_lte_4g_router.pdfIn PDF document text
    • https://danilisu.files.wordpress.com/2020/11/descargar_fluidsim_3.6.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_off00007f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F63 6144 bytes
SHA-256: 4e1c41ff8f8484879c194b4bb76b5d855badd2fa94e1507ad2716e12e25903ed
font_01_sfnt_off0000941e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x941E 10688 bytes
SHA-256: 3f3542baf5d396b11d887c6d39cbc6887d6c9873caa086908782f4d6c05e5a52

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