Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c8805ae4c565b13…

MALICIOUS

PDF

69.0 KB Created: 2020-11-23 06:32:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7d1d791c12757b454dae0a4f4c36ec43 SHA-1: d7755cc9e4745f7517a50e9873fd79052225933b SHA-256: 2c8805ae4c565b13a655819503e71c44be22d45ed53fad78f7bcf980aec0c713
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://trafftec.ru/aws?utm_term=fashion+designer+profile+template PDF link annotation
    • https://vofixerexelisat.weebly.com/uploads/1/3/4/3/134311693/zufudibipo.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/62f6eb8a0c.pdfIn PDF document text
    • https://kenumobubedu.weebly.com/uploads/1/3/4/3/134370592/dosasolif.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/7161cdc7-cb65-4b3b-a669-469cd2c9c137/lebisesi.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/electric_circuits_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/zitexoma.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/important_current_affairs_march_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/dmt_means_what_in_neurology.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/bhaijaan_bhaijaan_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc02027-8195-426c-9e85-433789a8e9db/14538131102.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/gefoxojax.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_off0000d16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16B 5412 bytes
SHA-256: d75c762fce9d88fed76ec9597b21ec721bbf7b2c68f13c603a0f0f95223a7f39
font_01_sfnt_off0000e3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AB 10576 bytes
SHA-256: 944ca62042961776bd88ad76a672f1bef038e45c206910788cf6d9c73ac6087a