Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4ee76972876a8f5…

MALICIOUS

PDF

66.9 KB Created: 2020-11-24 07:01:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6aea05971115c640c92f52a295593de4 SHA-1: 23e7153dd79406603b76bc37b34042f265cfc7ca SHA-256: d4ee76972876a8f545c399c7bda6c73b2f743b0b730364e27751980d3530ed3a
156 Risk Score

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://traffnew.ru/123?utm_term=lawns+mona+simpson+analysis PDF link annotation
    • https://lokedidige.weebly.com/uploads/1/3/4/3/134315074/jofowagita.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/wutisigila/jolokavagamirapefuj.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/gilelori.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/82521066918.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/gobobativefig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9fe1f69-b931-4718-bf90-d2c0506b1668/xavugamojaw.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/be_with_you_2018_eng_sub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e92fc22a-dce4-446d-a33b-4a7c96497b0c/pepuraxarit.pdfIn PDF document text
    • https://s3.amazonaws.com/movodanex/290_mother_gaston_blvd_brooklyn_ny_11212.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/56960983394.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_off0000c764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC764 5004 bytes
SHA-256: 4ea8fde1e762be8493d041fe757ebc5073af6c385b8750033a01b06dbd139f2a
font_01_sfnt_off0000d877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD877 12296 bytes
SHA-256: a79bfc8c02cf174a4ef6ad4654e3816c1e8899c6dd363f2a46710e33ae88fb61