Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8124d71b390f69f…

MALICIOUS

PDF

68.7 KB Created: 2020-12-28 06:08:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 76d99790cb2c34bd079c8dbeb0d31da6 SHA-1: 9e03b9b51de131c4945e335c9542f16c16293681 SHA-256: b8124d71b390f69fac675ef16312182c4b8c581bff6d2aa7cbf8ca9283c3a4ef
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/123?utm_term=pltw+computer+science+1.2.4+answers'. This indicates an attempt to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/123?utm_term=pltw+computer+science+1.2.4+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4456143/normal_5fd7c107b5f0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407996/normal_5fb85cba68cd5.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/ezjegcq/rebola.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403816/normal_5f9a8edb69aa0.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/fazujo/cisco_aironet_1815i.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dac2986d-36d2-4f4e-b075-398e14972a8a/jinomorepaxolunugovitujiw.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/kingspan_cladding_installation_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d73917a-4c88-482c-a9a9-96490fe160ba/lukodatebozopokuxaroziv.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/narasimha_karumanchi_data_structures.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/xofogafaz.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_off0000ce57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE57 5476 bytes
SHA-256: 433a413dc247ae474749dfdde637da6b89a004dda73401508bee30a3df16e3c6
font_01_sfnt_off0000e100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE100 11120 bytes
SHA-256: 3973f9bd12dddd43066fa5861674f301ba6bf99c66072dd76412e7346ff692bf