Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d0fe50ad827a32f…

MALICIOUS

PDF

94.9 KB Created: 2020-12-28 17:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 113acf39a55418b0ac22fcd4e6b55f90 SHA-1: 10db4315bcfdf1890f7f28e5b3be59cb4db0395d SHA-256: 5d0fe50ad827a32f7e6d760ad71f0767d5e7fbc9c9c9d48a3aadeaa0ec981418
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://traffking.ru/123?utm_term=elementos+que+conforman+el+planteamiento+de+un+problema+de+investigaci%25C3%25B3n PDF link annotation
    • https://lujukote.weebly.com/uploads/1/3/2/7/132712447/8480518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370561/normal_5f8a324ec1927.pdfIn PDF document text
    • https://sovopubi.weebly.com/uploads/1/3/0/7/130775052/bfd021aec9db6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465142/normal_5fe60f7aa556c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381085/normal_5fad7fbb81b96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_5fb4e9933db5d.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://s3.amazonaws.com/winumigutam/blackpink_kpop_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/fewawewo.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/tozusufe.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/airspeed_velocity_of_an_unladen_swallow_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/manorama_calendar_2018_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/suximolenedudobomus.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/eu_fundamental_rights_agency_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/valores_normales_de_biometria_hematica_en_neonatos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a5cf735-a9bb-4164-acbf-2c6aca6332d9/84433556537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71a577b8-cad2-4e63-91ba-5bc1ca68f1a0/59994085470.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_off000121ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BA 5776 bytes
SHA-256: a99e920d889d06948ab448e96af7a695072b68aa17a44a39a2d3b3832902264a
font_01_sfnt_off00013507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13507 12004 bytes
SHA-256: 046228042ee4e2fc18e14c16d66477384be9838e3e97d18b860ceeab1ac6e69b
font_02_sfnt_off00015c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C2F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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