Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab41fd5ec010d2ec…

MALICIOUS

PDF

44.3 KB Created: 2020-11-09 00:30:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6f8c14ab364f9c6f5740b9687a27e8a9 SHA-1: 15774762c82eb79203c8b67ff2720621565a874c SHA-256: ab41fd5ec010d2ec6cb3ef764d84a4f9ce247f90a50674bb4f56e43fbc522800
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://traffset.ru/123?keyword=st+james+perris PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414871/normal_5f9f3ea07f495.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384320/normal_5f994924b538f.pdfIn PDF document text
    • https://mematuseb.weebly.com/uploads/1/3/4/5/134516495/wafafifonuzi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408583/normal_5f9344bb47111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402014/normal_5fa1134d66632.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413575/normal_5f95a27a6a34a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416934/normal_5fa31053ec604.pdfIn PDF document text
    • https://xetutinafo.weebly.com/uploads/1/3/0/7/130775845/ranipefule.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/80866d8f-db38-4e40-a818-991bbc0aa6e7/harley_davidson_stencils_for_airbrushing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4911e86-b042-4d96-b278-1f4d7dbb3801/78491375047.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/bureaucratic_management_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/pdf_to_word_converter_pc_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/medicare_levy_exemption.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/ielts_academic_reading_practice_test_with_answers_2019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6177 4684 bytes
SHA-256: f54095e6bcfae72176bd4640a892f81abfbf63ef4e9274db285b512fce92d15a
font_01_sfnt_off00007157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7157 10900 bytes
SHA-256: cc7826c71514a9afc3acd308aa35b718edc32989dde7126f5a2e6737d7ded04b
font_02_sfnt_off00009678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9678 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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