Malicious PDF — malware analysis report

Static analysis result for SHA-256 22dfec34c14171af…

MALICIOUS

PDF

46.2 KB Created: 2020-10-27 01:00:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: b82c8ac88cae915418996f522fe39793 SHA-1: 46a9da286a014e4dea71ca8a7c1f99f0b6c8b0e5 SHA-256: 22dfec34c14171af166c5e92f39d923b52828519ccad270a1915b1da89c78ff6
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://cctraff.ru/pify?keyword=escambia+county+arrest+public+records In PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/mixatirajim-mofuxusofewaga-raketeginog.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/xomati-finirofuris-fizeronuze.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/bd55ea4.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000745e.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000745e.bin)
    • https://s3.amazonaws.com/fumiposamisur/bisexibam.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/que_es_una_mezcla_en_quimica.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/podozizemezuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6474/1026/files/59800246506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8792/3862/files/global_financial_markets_giddy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/5856/9628/files/the_amazing_atheist_youtube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5222/8519/files/muscle__fitness_101_workouts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/7896/8230/files/dibabamawukukizomewixadu.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/top_behavioral_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/lactogenesis_humana.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/bloqueo_del_nervio_ciatico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/213b5924-67ad-4f2f-9547-7cff929a560c/xeverorosuzavumewopamariw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58312483-4af6-4ca0-8820-70bb1cf839a3/vanegopoxotofifevixefila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2bc5b59-8ac2-44c0-91ac-8be86f548ec4/werozukikenamunog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bf9c108-ff89-48a9-a6d9-28775f46b559/wagokilom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49d80bab-482e-4e6b-be59-42f9a0ffab1f/relojetir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50037aa8-2867-47a3-8f4c-5dc111360bd9/42735151423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e7bf0f0-ea2d-4577-81eb-4fd2a6981053/zuzos.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 extracted file (font_00_sfnt_off0000745e.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000745e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x745E 5420 bytes
SHA-256: 44b440292d21e4ea16b63bba3025a3058890bdff0d7a49a25143c5609db1b8ae
font_01_sfnt_off000086b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B0 11044 bytes
SHA-256: 32db55d0b29e70c18ac04f047f6861ad946234ee2aaa68c394d777f2688f447c