Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc5c79e63a01fc31…

MALICIOUS

PDF

42.9 KB Created: 2020-11-08 19:58:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: a590fa26e0cee0ef9d434768747e7582 SHA-1: 18ea1c0f9f20731563ce985a35a72926ca52a357 SHA-256: cc5c79e63a01fc317210db507f8af58debca11439f5e6c0b70428ead541b95c6
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://traffine.ru/123?keyword=collins+key+try+not+to+laugh In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_5f89df57000b9.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/4624383.pdfIn PDF document text
    • https://bowilidorufe.weebly.com/uploads/1/3/4/6/134603038/44fc80a7776.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/xilasisefi/szckte_yap_konu_anlatm.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/pluto_tv_activate_roku.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/zevifunibewojabovaba.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/stored_procedure_in_sql_server_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/little_einsteins_episodes_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/welutizenop/58794585257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f78635a-83a6-4aa0-bacf-1b4ad54e8699/47499181933.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_off00005bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAE 5016 bytes
SHA-256: c79a0647f6e86b7f4ac7288fd5a61fac5d10c96566386cbcc31667669df2f46b
font_01_sfnt_off00006cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBC 10536 bytes
SHA-256: a1ddb6f774c005b76770ed192d27e5b369a1ee6cfaf541dd3bcef200340b677f
font_02_sfnt_off0000909d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x909D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34