Malicious PDF — malware analysis report

Static analysis result for SHA-256 756f55277f9b330c…

MALICIOUS

PDF

67.1 KB Created: 2020-12-14 00:39:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 50d61e324d87966b67272edc12390ea0 SHA-1: 764542e6add8ef46c66ca235e605a3d42208750f SHA-256: 756f55277f9b330c6232b608a50a8689e9b3bca4bbfa8028c586f7e0e568fbed
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Cities skylines scenarios'. The presence of an external URI and the high ML score strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=cities+skylines+scenarios+left+hand+traffic PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406169/normal_5fb039085a692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452861/normal_5fa1abbd2eebc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452217/normal_5fb38b498f896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454425/normal_5fae28bac3fd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413235/normal_5f9c2bac28b2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453740/normal_5fa12c54348d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379048/normal_5fbb63d316507.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/fizufapu/red_gold_background_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb359abf-e9ca-4d04-b21a-b749fa4bf778/dufurejibexokapaxugaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27199f90-0c99-4c67-9518-ff353f0e465c/lepekalonujinutabakifi.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/gibutoletavoladokaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/010862f6-5a12-40b5-b4d4-ac4518b11d8b/42461847360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/729a8fb2-4d5a-464e-9929-517699920de0/bubogide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12332016-974e-4f26-bf07-3547bf7e4a9a/kemedadafawabu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e701bda9c57a97be38be/t/5fc1d0d55147b14804761707/1606537429473/21881485881.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93042a09-e0ea-40f1-90a8-6dae05018b01/wow_castsequence_macros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb2ed861-ca0c-4f6a-ba90-d1f322ad822d/learning_and_growth_perspective_examples.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_off0000ca24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA24 5180 bytes
SHA-256: 12618227839551a6ee13e2cc1096a72da7672252cd6fe294329317a3e4a34672
font_01_sfnt_off0000dbc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC4 10476 bytes
SHA-256: a3fa2ea441c66c4450230e070da9e147192b4f9f65a59a806bdcee699b817cc2

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