Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0350c4f2b98fb2…

MALICIOUS

PDF

68.9 KB Created: 2021-03-18 12:10:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f0e326fdfdc45653e7c7a5df0c66e747 SHA-1: 53468297d63c197ca3b215a68b26f1ff7124284e SHA-256: 2f0350c4f2b98fb28279a21b3573ce11fed9ed7cd4aa3afdd7fa0b1f19c586fc
184 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8004

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://kuzutuzo.ru/wix?keyword=undefined+reference+to+vtable+for+constructor+qobject PDF link annotation
    • https://cdn.sqhk.co/bexutavukaro/jgNXxgh/tefitoderawafoliraki.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/jagggii/blaze_and_the_monster_machines_cake_topper_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/dekawako/ghmoogf/kpop_idol_producer_apk.pdfIn PDF document text
    • http://wonozudobitisog.scienceontheweb.net/kifagusowijawanulubin.pdfIn PDF document text
    • https://cdn.sqhk.co/xebosulog/ijchfjj/cooking_fever_pc_mod.pdfIn PDF document text
    • http://wowogobofomufu.mygamesonline.org/pdf_file_reduce_size_mac.pdfIn PDF document text
    • https://roboxojepuz.weebly.com/uploads/1/3/4/2/134235986/7f554c.pdfIn PDF document text
    • https://nimaxosonoj.weebly.com/uploads/1/3/4/8/134897368/8601860.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/h6r7luQ/facebook_marketplace_appeal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_e5e0453ca6e14a51894998988b21b841.pdf?index=trueIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_88963f306d194db7ac0882e0ce3454c3.pdf?index=trueIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_7f4053f351a04bccb16e7f031511a9b7.pdf?index=trueIn PDF document text
    • https://cb0920a4-0dfc-4587-8161-bd3bf883b043.filesusr.com/ugd/df391a_9b04246be85442938c595cdd87fe709c.pdf?index=trueIn PDF document text
    • http://lumosaneja.onlinewebshop.net/58248072309.pdfIn PDF document text
    • https://6e678f60-abc6-404c-883a-cd1729fdffee.filesusr.com/ugd/e4291f_0bf1b2d5503a4d6a973bb0073ce86b7b.pdf?index=trueIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_63087b31a9b842e28f9258782c3b468d.pdf?index=trueIn PDF document text
    • https://b5d51143-f34a-4a4f-9265-6917490cb775.filesusr.com/ugd/9f69bd_660d94d828ae4d7e98c37c89e8390dca.pdf?index=trueIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_91d9fe03a48c48a9bb313d18b4d63c1e.pdf?index=trueIn PDF document text
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_0fb3dfdcf2f44b9fbaf7ccdc751bda4c.pdf?index=trueIn PDF document text
    • https://793776f3-68b4-44d3-947a-596ce2c6f652.filesusr.com/ugd/4e977a_12ee47ebd0a845b38141cff763eb1112.pdf?index=trueIn PDF document text
    • https://54570836-76ea-4100-b78f-d1ba4c3cc0d1.filesusr.com/ugd/21ac59_3f6d0d70c1b54795a0a2c585abbf249b.pdf?index=trueIn 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_off0000d5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B4 5408 bytes
SHA-256: e790b6c3cd3c98f4b93eda6c60a6d23213857af7e1375226ddb87203f3f022b8
font_01_sfnt_off0000e836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE836 11552 bytes
SHA-256: f4ac8e581e4e1904b75976ab5b80a6d6fcef6f24ad1e5ed5a8542766973b3411

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