Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b6f8ba55c811fcf…

MALICIOUS

PDF

153.7 KB Created: 2020-12-23 15:09:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7fe6554970987265b674091c638a45f2 SHA-1: d1e047a531ab7fb548dd7a61405ac420a91d0b69 SHA-256: 6b6f8ba55c811fcfd4f7741c24fe28336accdb11a7b01025583c214bd37b5a89
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded URLs, with one specifically identified as a malicious redirector pointing to 'cctraff.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The document body, though heavily obfuscated, contains text related to 'Runescape' and 'wkhtmltopdf', suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://cctraff.ru/aws?utm_term=runescape+clue+scroll+guide+osrs In PDF document text
    • https://pulatufulufu.weebly.com/uploads/1/3/4/6/134610330/dee1d7b166894d.pdfIn PDF document text
    • https://senobatupubem.weebly.com/uploads/1/3/1/4/131437889/raraviz-sezuzobeduvono-lisarekomeli-bekejojax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463264/normal_5fad73a98eaa4.pdfIn PDF document text
    • https://feresaxeto.weebly.com/uploads/1/3/4/6/134609658/rapovobedevifen.pdfIn PDF document text
    • https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/f71b0f8c8ec0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449766/normal_5fde50991b638.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/vawoginele/20398048416.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/63461733712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a34bc4-aebd-442c-b361-01f6f74f37f0/38896047340.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/videoder_apk_2019_for_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/28781158015.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/18666131213.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20A3B 5248 bytes
SHA-256: eea219e403f05cc8cb1765a3f38fe1084cb4a1c0b682bf674cf8cf305d03c8ff
font_01_sfnt_off00021c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21C27 11632 bytes
SHA-256: 654f3d7846011cb7c7d173f1d342c3fa7fcc849149542138377b64959264485d
font_02_sfnt_off0002438c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2438C 16140 bytes
SHA-256: 00468df452218f546d59995a7cf9b4297092e2fd476dbd2f6ce79846bd051107

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