Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d5a44742b8615b1…

MALICIOUS

PDF

79.2 KB Created: 2020-12-24 06:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: d8ae34d7a7dd9ecc9a220d37a4b9458e SHA-1: d16994ae713e772bde7dfde4e7f0e314ccb169e5 SHA-256: 6d5a44742b8615b1239de92b772e3aa8dde37b5ca9edff741d5a7ffcddfcb9b7
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://traffking.ru/strik?utm_term=name+generator+fantasy+town'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/strik?utm_term=name+generator+fantasy+town In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446036/normal_5fd0fd95e2de6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406516/normal_5fc1f5120803b.pdfIn PDF document text
    • https://cdn.sqhk.co/purovufizu/LhbpwoR/76393881511.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5f9c963552d5b.pdfIn PDF document text
    • https://cdn.sqhk.co/sejujona/jffhcgc/balenciaga_white_green_triple_s_sneakers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420459/normal_5fa607b31f811.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391335/normal_5fc93395a58b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373527/normal_5f88b75fd5e70.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/farefasejikap/mdaemon_activesync_android_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/jewironijulubaju.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/peraxonesinofutoroxusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2022be09-c914-45e4-ba02-878c7715bb58/halloween_makeup_mehron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7920679-29dd-4fcc-a1f7-8eab1374a692/an_invitation_to_health.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/sokokupesasum.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/39105403009.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_off0000f52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52B 5220 bytes
SHA-256: 13d5c7e83564ac3bb8b34d886a9eaac0480326cca06667d7ed4ccb9710dbc6c7
font_01_sfnt_off000106fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FA 12952 bytes
SHA-256: c403cf0e99efa269c13e387df4d657ca1c14198768aeb36c9c57214093ac1028

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