Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f3bfbd94e738595…

MALICIOUS

PDF

67.2 KB Created: 2020-11-14 07:07:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 8f3e3d6657bdddc103530874a7bca9e3 SHA-1: 9dec5c832a951ae2ce616a0c26ecfd3d46f40537 SHA-256: 1f3bfbd94e738595267777e509058c2ec59dde5ed5c9ff68cb1e631a24e615fd
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://traffnew.ru/aws?utm_term=dav+public+school+paschim+vihar+admission+form PDF link annotation
    • https://subarijarasojud.weebly.com/uploads/1/3/4/3/134332778/ac29d05192a.pdfIn PDF document text
    • https://vakumijajuxos.weebly.com/uploads/1/3/4/4/134465568/d83892ab269cb.pdfIn PDF document text
    • https://kufofena.weebly.com/uploads/1/3/4/5/134504524/a3fb0d.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/gusudof_farix_peduves.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/a4167771-b9bb-44ac-a51d-b49bd4e01f81/recibo_de_pago_simple.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/einkommensteuererklrung_2017_anlage_kind.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/suriname_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/indian_journal_of_public_administration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd3d1952-c50c-4082-810f-105209841fc2/76570048181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71218d87-caf1-4249-a9b4-2443f1a8e7df/dojerukozinag.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/siforem.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/jenuzori.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_off0000bcf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCF2 5276 bytes
SHA-256: 13aa93f864ecce148629cc92621690dcf10cb188718461a398bc81d476c459d9
font_01_sfnt_off0000cea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA5 10248 bytes
SHA-256: 4470bdd3780caadf98db1f30d7dc95a61b9ff16fb3486769ec62aa568be37ca5
font_02_sfnt_off0000f12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12F 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

Open this report in the interactive analyzer, or submit your own file for analysis.