Malicious PDF — malware analysis report

Static analysis result for SHA-256 b755fc0d4e49e22a…

MALICIOUS

PDF

50.7 KB Created: 2020-10-25 19:28:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: dc855d445765a8dd74ca44afa5ebae10 SHA-1: e5799c7e5421aa411c8e334cc286bbafa320b343 SHA-256: b755fc0d4e49e22a01e6c59757fd9b0ee083de91c9efd291d7aff3a7543e0ef7
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://ttraff.cc/123?keyword=soldadura+por+resistencia+electrica+pdf In PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/gomusiwotizo-jozewi-riluvuf-lopoludopigemef.pdfIn PDF document text
    • https://gapixupat.weebly.com/uploads/1/3/1/6/131637313/binas.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/matuwaduwuvibad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f89ccc39c979.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369900/normal_5f8a4d704fc6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372072/normal_5f9105f3f0527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f8703711943f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f8e16d6e50bb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3005/1499/files/nfs_payback_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/8842/1282/files/39858730915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/5985/2486/files/15176636498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3692/4826/files/43002303633.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/features_of_bombay_stock_exchange.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/toefl_exam_pattern.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/garox.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/a_certain_magical_index_light_novel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04fd975b-1eaf-4204-895c-6c1773d31283/sisesaveboxipesijefesupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd301c0d-d216-462d-b42a-c1cc0730a9dc/50496258227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8460e13c-0bb0-473d-853f-0b84b850b044/97771819268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cce8c51-0104-4d0e-bc58-6888a2e0693f/31641199042.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ce78ff0-25c8-4b24-b7c5-990e553c89c4/44907520503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72597208-d1ec-49ef-bafe-32f041907e80/alien_isolation_can_you_kill_the_ali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b2cff11-b9fb-425c-8149-93fec3a83fdb/zefagelep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15046854-8d5c-4ab2-ab33-6ae8e2ccfc3d/patches_pee_movie_list.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_off000083a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A5 5252 bytes
SHA-256: 3286de0a313903886c61659e898be90544e8fe3ff2d0154efc99c6ad039941d6
font_01_sfnt_off0000958c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x958C 11660 bytes
SHA-256: fb170250398b47dafa4f2bc9fa3bc1195023023689a2a98b28d09ce021f522d5