Malicious PDF — malware analysis report

Static analysis result for SHA-256 c45d387583140d26…

MALICIOUS

PDF

41.8 KB Created: 2020-11-05 20:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 571584b1940cec9aac99e05537877a63 SHA-1: d60453094dc4b87881b5c913e7f18aef1ed5b512 SHA-256: c45d387583140d265d82ed6bcfa750ab35ed8b0d1e7722031ee51253bddc300e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://traffine.ru/123?keyword=black+bear+cafe+menu PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384650/normal_5f8c58306130a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373776/normal_5f9f2da1ef6f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_5f8c865094d0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386842/normal_5f953b9108360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401538/normal_5f9cf55443363.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408346/normal_5f9a067a5d3ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_5f8dd5d69224a.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/xituxojelamew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/febasigekefabasovagusomir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01e331bf-ce52-4875-90ce-68ce99e59657/tosuguximefejevomoti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8314e0cf-c8d2-4c4a-91b4-c69e8d13f1d9/podafefumoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3826fb8-5efd-4167-983c-67d2d49515e1/mm2_knife_values_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecb326c8-703d-4c4d-a9a3-59fe43b02d6d/zibemasunodoso.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/difference_between_zener_and_avalanche_breakdown.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_off00006326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6326 5104 bytes
SHA-256: 39dec9adb753075febf22409cbfeb14b888e70abbb0c8b82a4f142f4a3d5927c
font_01_sfnt_off00007475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7475 11760 bytes
SHA-256: 276ee3c9621148c43533a0150b243209f547c3e0cccc7f411447e01db77eb037

Open this report in the interactive analyzer, or submit your own file for analysis.