Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7a30a3c9ce5a168…

MALICIOUS

PDF

71.5 KB Created: 2020-11-26 09:28:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d8671687874203668276f497706e5881 SHA-1: 7d9e5ec57d219a067c6faf46492a378df6d06941 SHA-256: f7a30a3c9ce5a168065432efc5ee27eb07b14661dcfdc6c7315ffe54f80c8d61
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://cctraff.ru/123?utm_term=borderlands+the+pre+sequel+gibbed+save+editor'. This URL is known to be associated with malicious activity. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, likely for phishing or to download a second-stage payload.

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
  • 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://cctraff.ru/123?utm_term=borderlands+the+pre+sequel+gibbed+save+editor In PDF document text
    • https://cdn-cms.f-static.net/uploads/4465151/normal_5fadbf3d1be08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471704/normal_5fb01a0e2aeb7.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/sedimeraxufi/79711709192.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/manual_for_brother_hc1850.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/mckinsey_7s_framework_case_study.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/steam_gift_card_free_code.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/sakipikuwebas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fefcde1-1cd6-4497-be7e-06598d385c46/samsung_galaxy_s2_manual_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/3m_9100_overhead_projector_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/south_pasadena_ap_chemistry_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/befijovep.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/xirewubupug.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/19118242209.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_off0000d868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD868 5596 bytes
SHA-256: 502a64a55504ffe67c7a4d2a1ddc6ea3b3ebe8953388ffb0132c6482fcb654e9
font_01_sfnt_off0000eb5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5E 10984 bytes
SHA-256: 854efe07a9c33799be05c0a57989907e13a67a9f119c3922abaeaaaf9bf98674

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