Malicious PDF — malware analysis report

Static analysis result for SHA-256 de40cb45f6723a40…

MALICIOUS

PDF

38.8 KB Created: 2020-11-08 13:08:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-03
MD5: 9db212f2b8d2d25a1d0210d59537c83a SHA-1: 0e0e7b3fbc97f0d3ac389d1b1e1faadfdb84796d SHA-256: de40cb45f6723a40c877bfe457c84d1f3248af86045fbdec3ff13543696fd008
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://jutivodip.weebly.com/uploads/1/3/4/4/134489611/e055ea1b4af1253.pdf.
  • 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://traffmen.ru/123?keyword=speciation+worksheet+%25232 In PDF document text
    • https://s3.amazonaws.com/lodunixodetum/free_printable_data_analysis_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/tank_trouble_4_unblocked_6969.pdfIn PDF document text
    • https://jutivodip.weebly.com/uploads/1/3/4/4/134489611/e055ea1b4af1253.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/hands_of_mercy_fayetteville_tennessee.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/3274198.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/1732614.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/202d5.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/iodine_clock_reaction_lab_report_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/83704144715.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/seismic_wave_theory.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000599e.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000599e.bin)
    • https://xuminewewebi.files.wordpress.com/2020/11/15670121941.pdfIn PDF document text
    • https://gopalov.files.wordpress.com/2020/11/zazapemakumijege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22d61740-6a0a-4664-963b-e2018a51eebe/winiju.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_off0000599e.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000599e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x599E 5248 bytes
SHA-256: 0b32d8ebfece30c5e413ea3447efe83f6a95b792b2e1de8a88592467ae78ef93
font_01_sfnt_off00006b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B88 10300 bytes
SHA-256: 0379b59a926dd4e8b58cf5b90050a240c21731ee0a8493a6497f4b2b9f8585ed