Malicious PDF — malware analysis report

Static analysis result for SHA-256 0926a5f4177babb4…

MALICIOUS

PDF

93.9 KB Created: 2020-11-23 12:29:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fa6e491cdbd36822693b1530d8c7f015 SHA-1: 5d836694f0c0c86d430adafe9fadc5e35c6a629f SHA-256: 0926a5f4177babb4c1ad95fecf90b4366ff1ccc63d5d2ac0a101744679ab806d
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 0.9997

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://trafficel.ru/123?utm_term=skyrim+aela+the+huntress+died PDF link annotation
    • https://xigepeseforala.weebly.com/uploads/1/3/4/5/134508125/wabum-luvukodamav.pdfIn PDF document text
    • https://dusexitope.weebly.com/uploads/1/3/4/6/134646398/8771409.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/fatisake/39102433237.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/badabibevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e161bcd1-a20e-4f94-9f42-cbf8033de8f5/tivifimonuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/da_bomb_bath_company.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aa4af55-28e0-491e-81a6-652686f6ceb7/55639265154.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/32171522250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e7b5516-f260-448a-81bd-4eb47d3ff8b6/pomat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/154240b7-ac34-4367-9c3c-1447bcf0ca2c/3162439821.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/ielts_writing_task_1_topics_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65901b84-949d-4b21-9caf-6f9f3dc86ec8/56099551063.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/aether_elemental_warlock.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_off000134f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F9 5332 bytes
SHA-256: aa0185ddd4422324eae722ac931982d5e05aee05aad68ae5101132ccb2bbdef5
font_01_sfnt_off000146ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146ED 10420 bytes
SHA-256: 65bc5dd268962ffc9de5a1be5bd3032c715efd64b01346bafbc59129ebfa015b

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