Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada3fe47eb860980…

MALICIOUS

PDF

72.5 KB Created: 2020-11-20 00:27:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: add869123554484eaa164b081c24a042 SHA-1: 26125755dfc457cd963d78804d7473f90ba7925a SHA-256: ada3fe47eb8609808355d9af2f5647ab5248cc53533075cb2b92be04ae3deaab
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of numerous external links suggests an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/123?utm_term=9th+grade+poetry+lesson+plans PDF link annotation
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/319c4bd274986.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452587/normal_5fa11d8603920.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389830/normal_5f96bcf38a569.pdfIn PDF document text
    • https://sabopedawexidix.weebly.com/uploads/1/3/4/3/134305122/zupizozixumisipovapu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c71c54b-89cc-4ef8-b5d2-dec9d4e08fbb/67820663705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1daa4e57-2f81-407c-8434-979517fb502a/berutuxagerowuzapumusibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b30c5fe2-83bd-4319-b476-b52e6332002f/68342171244.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/android_create_attributeset_programmatically.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb6d790e-56e9-4bac-984f-a79b289ffcd1/bugivoselutajamevox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40d047d5-ee9c-4644-ac42-db79aed24687/legends_of_zelda_ocarina_of_time_rom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39bf7097-6347-493d-bafe-0c4aa3a1ef16/introduction_to_management_science_12th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/atkins_phase_food_list.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB0 5384 bytes
SHA-256: 013fc27e88c4bc64ec9030571a471c06abbbbbb4fc2d9fa32395859d32543ab1
font_01_sfnt_off0000f1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FC 10544 bytes
SHA-256: d7d488af1ec764f68f693578a5bf95d11eab334a84b450b7e0bb06062a0dba25

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