Malicious PDF — malware analysis report

Static analysis result for SHA-256 35aab33de2c781a2…

MALICIOUS

PDF

79.7 KB Created: 2020-11-10 23:27:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5ab093c4692baf87c60157a48eaebba8 SHA-1: 1f214d2d0b4ed542f14f8722b466d77d5e030566 SHA-256: 35aab33de2c781a29662535988e26f14eb688bc0a7dda2e113c57849c0b6bf85
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and extensive external linking are common tactics for redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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?keyword=bismarck+extreme+guide PDF link annotation
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/9042127.pdfIn PDF document text
    • https://bijoxopibomer.weebly.com/uploads/1/3/4/3/134325560/biripajurizod.pdfIn PDF document text
    • https://vedakevuvapi.weebly.com/uploads/1/3/4/0/134013486/9405682.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/613a711ec7ef.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/xidobitabevexat_pawoso.pdfIn PDF document text
    • https://munazuzane.weebly.com/uploads/1/3/4/3/134350045/jakox.pdfIn PDF document text
    • https://xumuxurubaxuk.weebly.com/uploads/1/3/4/5/134501003/numeseforunufozo.pdfIn PDF document text
    • https://kibibobufusasi.weebly.com/uploads/1/3/4/6/134643218/womigozaxo.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/3852789.pdfIn PDF document text
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/2291413.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/juzinaramip/65291488772.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/douchebag_life_hacked.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/algebra_1_student_journal_answers_pg_36.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85de300d-1828-42bf-abfc-9a1caa498525/dr._jessica_lindsay_polyclinic.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/72100749564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6009bf69-2dcb-4efd-be5d-5dfbf87a7da2/dimumuwojakejogowexasoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/classroom_activities_for_english_language_learners.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DB 5076 bytes
SHA-256: d85e922e8d52527642c2452f44ea101002b39e4e1c5e2d87653915cfc5f383bc
font_01_sfnt_off0000e71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71D 12784 bytes
SHA-256: 17acd82a67f2b00d2fe8e50ebb968221e97004565d14434f5aed7e2aea61ff9d
font_02_sfnt_off00010e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7B 16092 bytes
SHA-256: 2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140
font_03_sfnt_off00012341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12341 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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