Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb31e28e04fd4d8…

MALICIOUS

PDF

43.9 KB Created: 2020-08-28 06:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: abad2aa200e61870abb724c7733e2421 SHA-1: db94964428ac34876c168daf92a191d87b6b7add SHA-256: 5cb31e28e04fd4d84d680c787196c7a9c709c5c60bac7000268b558268aaccbc
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.link/pify?keyword=dmv+livro+de+condu%25C3%25A7%25C3%25A3o+calif%25C3%25B3rnia In PDF document text
    • http://files.sensibleshock.com/uploads/1/3/2/7/132740479/vasesejakukek_faxej_lelikam.pdfIn PDF document text
    • http://jejujaj.theelephantstudio.com/uploads/1/3/0/7/130739678/dalubetab.pdfIn PDF document text
    • http://files.silkbodywaxingstudio.com/uploads/1/3/1/4/131438741/5058799.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://cdn.shopify.com/s/files/1/0432/2276/1635/files/letter_headed_paper_template_word.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4333/5837/files/alphabet_grec_prononciation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3621/1362/files/biocalculus_calculus_for_the_life_sciences.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9017/3333/files/ipcc_report_1._5_degrees.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6221/5324/files/sutevutoxutelaxigin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/34402097726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/ccsk_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/24296109344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/historia_clinica_nutricional.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0006/9283/files/95952568423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2991/1957/files/android_studio_jdk_path_windows.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/72264428107.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3D 5484 bytes
SHA-256: 773e14722edaafe8d1fc5321e66dc0b049b37f7c6a9af760bb12ac697d98240c
font_01_sfnt_off00006db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB0 12072 bytes
SHA-256: 146bebe8a34b3891951418635af10c38d57c6aaf2f68cab5ae3a999175567d06
font_02_sfnt_off000092c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92C0 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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