Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aa4abe11796d40c…

MALICIOUS

PDF

70.5 KB Created: 2020-12-21 08:47:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bcf715b5ccb04d9125bbd3a343267e2a SHA-1: d0c72ff64b35b92bd833870def69ba91adbe21cb SHA-256: 2aa4abe11796d40ce0a80916fc90baedf8907c9f8a9891e7e3bbc48033179219
156 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 ClamAV and 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 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=rent+battery+charger+autozone PDF link annotation
    • https://foseduvix.weebly.com/uploads/1/3/4/4/134491956/loninatonur-bebimolojo.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/minikexap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491665/normal_5fad837973468.pdfIn PDF document text
    • https://resowijex.weebly.com/uploads/1/3/4/6/134681832/livova.pdfIn PDF document text
    • https://raligeledow.weebly.com/uploads/1/3/4/8/134893256/fakojetuwodujo.pdfIn PDF document text
    • https://simokodopegaliw.weebly.com/uploads/1/3/0/7/130776428/f4a70c484848ca8.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/toguvaju/17931372970.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/rewitarunesexer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38e83285-3edd-43a8-b250-2dfa4630cbb2/alien_periodic_table_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/embassy_of_india_riyadh_personal_particular_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/wipogekosetuzan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0273bfe8-d156-4ed4-a63d-e28caa729064/84418859873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dad540d4-8a4c-468f-a572-4f125dd5b726/ruginakebofibupage.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_off0000d8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EA 5152 bytes
SHA-256: 0c9a7bad1156e215e27b69e15ce333fbb1ac1b4fba9bb807971d7556a1c8070c
font_01_sfnt_off0000ea85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA85 10184 bytes
SHA-256: 5ae2aaf987d6ca52e86e72d9c5b1004c0f72751cb3585be39193ab5289d4a037

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