Malicious PDF — malware analysis report

Static analysis result for SHA-256 f92a90ffaad1c360…

MALICIOUS

PDF

41.0 KB Created: 2020-10-05 10:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f5ed0470d8e5ba23708f0e4132e7c52f SHA-1: e2cecf6168b8df23dcc673c84719beb62f92882d SHA-256: f92a90ffaad1c36037fd91b334a30105d8866b6e4237b0b0a083f2e7582dc834
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://ggtraff.ru/strik?keyword=bond+energy+chem+worksheet+16-+2+key In PDF document text
    • http://files.writtenbybeth.com/uploads/1/3/0/7/130775484/7316160.pdfIn PDF document text
    • http://files.tallulahsjewelry.com/uploads/1/3/0/7/130740012/1431625.pdfIn PDF document text
    • http://files.angelsgowns.com/uploads/1/3/0/7/130775698/fotofiwoves-tasujubabola-zazibu-wunumivizog.pdfIn PDF document text
    • http://files.theatreartspt.com/uploads/1/3/1/4/131407708/mawijaked.pdfIn PDF document text
    • http://makusar.leverageleadership.org/uploads/1/3/1/3/131398406/wisapemavasanukaf.pdfIn PDF document text
    • http://levuxupu.asdarchitects.com/uploads/1/3/1/8/131856166/rudepadaxubabokelepo.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/bd7e38a8-5d3d-411b-b071-d5b4cd79e5b7/xobefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61928590-cebb-4862-86a7-7186a4510829/zatewevarekoguver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c78406d6-c725-4b52-894c-caae5ab244e4/doruvonelujoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/periapt_of_proof_against_poison_3.5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2812/5595/files/ouran_highschool_host_club_characters_height.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/8599/6450/files/cbu_civil_engineering_flowchart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0776/9752/files/79381730339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0712/5921/files/living_with_the_himalayan_masters_tamil_free_download.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000600f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600F 5788 bytes
SHA-256: 63e08e6ff99f8da7914ce7a783962c94ce65490f733a246a853d41a98ee8dcc8
font_01_sfnt_off000073cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73CC 10344 bytes
SHA-256: f8c869926fbf193700b9fd42625f75987e9cca45deea771b11189e43abb9f2d7

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