Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dbbadeca57c7d06…

MALICIOUS

PDF

68.0 KB Created: 2020-11-29 03:08:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c045d104beda5e654326c4f3f01807df SHA-1: 9cd887a27efcb442b0c6ef69458bf5d8e15926f5 SHA-256: 4dbbadeca57c7d06af0e6e0a63d9d18b7147d8153cdcb6aa854bc180078af310
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 0.9998

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://trafficel.ru/aws?utm_term=carrizo+plain+wildflower+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490534/normal_5fbc5a6acb9c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385010/normal_5fa57e63ca152.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/suwererixok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370080/normal_5f90b417928d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377128/normal_5f8de3eb4c36b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_5f970084e62c5.pdfIn PDF document text
    • https://valezofijamope.weebly.com/uploads/1/3/4/4/134445284/7392558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374379/normal_5f90c934eb4f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f97fb4757dee.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/0efb8dae-5b47-4c25-b60c-1465fd55c70c/85010505042.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf2d746f-c10d-4219-a358-23191f9af6c5/eso_castle_anvil_secret_passage.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/contemporary_comedic_monologues_short.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/csir_net_question_papers_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/752807e7-ec40-4075-a050-52c6628c69a9/lasawapipabovivavupatoba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a620be4-5e65-4c72-9afa-eaf9180d5de3/10427026117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c41b1146-2807-4d32-9707-2c9023bc435a/principles_of_managerial_finance_14th_edition_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b11962b8-e1d6-4942-87f7-a7d929377703/35592034834.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_off0000d039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD039 5080 bytes
SHA-256: 36332bac3b8494de258b4859a6cfc6991eddace8a8dfc842992f919095049e77
font_01_sfnt_off0000e1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AE 9752 bytes
SHA-256: b48defcfbebd0e62b6e540f073787c8c44d1fdb4cd192a34981461215129a4f3

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