Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7f32bb47ad96017…

MALICIOUS

PDF

70.0 KB Created: 2021-01-07 01:17:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7b518d8223afbe438c976817b33a83be SHA-1: 9257893dbb8656f152eae6b4add1a711ea613450 SHA-256: e7f32bb47ad9601704e4223ee55fa1f984cadbc9158f683d856f4483256c73ae
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 'traffmen.ru'. This URL is used in conjunction with a lure related to the video game 'Monster Hunter World Iceborne'. The ML classifier and ClamAV also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious redirector strongly suggests an intent to lead the user to a malicious site for phishing or further payload delivery.

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://traffmen.ru/wb?keyword=monster%20hunter%20world%20iceborne%20alatreon%20solo In PDF document text
    • https://cdn-cms.f-static.net/uploads/4484815/normal_5fb9b929e69c5.pdfIn PDF document text
    • https://jojawetoterul.weebly.com/uploads/1/3/4/4/134404105/tajuke_nasemomilexox_vikuvukuna_mabofejuka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368984/normal_5fe4be1097077.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxesojogugu/djg89ia/67139294109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408871/normal_5f9ffc9bdba48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374369/normal_5fda95917d4c8.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/xizaxamuxive.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/wulotugadag/tukitilow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce733cc8-1642-4558-b1c4-4b624d1c9e5a/tibikewapinuzagareselo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94dbf29a-3128-48f9-bca6-41ff613e8821/baby_carrier_cover_diy.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/excel_shortcut_number_format_comma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b06267a-763e-4326-a454-55ce5cf5521c/kepogajagixamepepagope.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_off0000d786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD786 5264 bytes
SHA-256: aa348bf8a0163a76fa4f6dd772456f4d12b96ded5a430762ff5e62d29ea2b44b
font_01_sfnt_off0000e97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97C 9860 bytes
SHA-256: e99dfe4a8e37e516893a8ee44ddb29b2d2c30ee58debe8075f42da85b1e7a992

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