Malicious PDF — malware analysis report

Static analysis result for SHA-256 01890567ac4c8d4b…

MALICIOUS

PDF

43.0 KB Created: 2020-10-23 00:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-08
MD5: 2d1ff06a61853ef2af5099fadf086211 SHA-1: da9374989f65f29d0f9733b0cbcbde12eed12a83 SHA-256: 01890567ac4c8d4be84a73c5e8d50002a3a95d9b4f4a96c090778fe96a66122c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains links to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a phishing lure, likely attempting to trick users into downloading further malware or visiting malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/wb?keyword=business%20statistics%20notes%20pdf%20telugu In PDF document text
    • https://s3.amazonaws.com/henghuili-files/sofufejobazufarogiger.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/kundli_in_hindi_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/52383035930.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/guzisadopaz.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/xutisajopifoxilupir.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/59126994133.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000663e.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000663e.bin)
    • https://uploads.strikinglycdn.com/files/f9aff354-09c6-46ce-96b7-3649703c13a7/46482724301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a28f46a-b6ed-4802-8d0e-1555b60cba10/sikabovufijawivulil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e16eff69-e4d5-47a1-8947-5a47bcb56e79/74348647503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61c7b51c-a71d-4581-84d0-d200edda64b8/72551723898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b348aaff-8bfe-431a-ab29-8a737febe913/crack_the_nbde_part_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39130df8-d4e4-47e5-8fe9-209cf6d71eca/makulitukuvuketanojoral.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77c14bc1-9e92-4299-ae9e-f3ab0207b7b5/rewezobofasiviririgu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b796fc-5c96-45ff-b4d9-90c9903a65f5/89567540332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d136eae-1434-44e2-88b8-deecf9655418/kinns_the_medical_assistant_13th_edition_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae45e30a-05db-4235-8bd2-6ac4974e2eb1/ardas_kra_song_ringtone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85eab60d-5ac7-42d6-a025-1115073538aa/kefuropilejiwobavupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b61fdb3-ef11-48fc-a9f0-fed9f670d3a1/24703166673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fd33bfb-dfc6-4f53-a8bc-fc23b815ba7d/98476449462.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_off0000663e.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000663e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x663E 5276 bytes
SHA-256: 41fc4de00942fdfae46ebe509cbb2df84598eee2197e2e6d9a2938d99f9b473f
font_01_sfnt_off00007844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7844 11376 bytes
SHA-256: a331c86dfc4eda001df3aaf4baca5f97af0d18c97b934f85a968b05375445e85