Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e283ae6aa34ed36…

MALICIOUS

PDF

86.5 KB Created: 2020-11-25 21:55:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a46e02b27764ddffb36c610a4a40b80a SHA-1: 19c35745f95a7ef4c9a23946d8309cea788aa2fb SHA-256: 5e283ae6aa34ed3600dabe58eb44a20fe3a4654fbc0098a309250572253db136
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the presence of numerous external links suggests an attempt to lure the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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.
  • 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://gettraff.ru/123?utm_term=shuudengo+capsule+hotel+de+kickassanime+episode In PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/d059b4cf2fc62b0.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/6870013.pdfIn PDF document text
    • https://bulasenojagaroj.weebly.com/uploads/1/3/4/3/134357248/8e59a90466.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_5f9cd222c71d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457577/normal_5fb7cee185872.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a30ecf17-9077-4239-af85-c21c604a4131/cch_chi_tr_chi_ai_th_nh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46d1e673-5f30-4310-a289-7ee395b63576/revising_prose_richard_lanham.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5ee771f-d706-4cd4-be67-b550ee9d663f/44266466868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61bd9a50-c6f8-49ff-b3b5-50001db4f000/2489726873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a6ec233-f15b-425a-bb3d-3c3302624c4a/begerupokorozijegutatofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e8aa751-5230-43e2-83b7-98846dcad15a/commercial_court_guide_appendix_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29ce5789-b0c1-447d-a947-6c2d6ffbacaf/fejixipirewupalun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e188ae2f-d227-42bf-9f85-3d11c042eb80/convertir_adobe_digital_editions_a_p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba4811e1-333b-41ae-96e1-e8a654992301/park_street_church_of_christ.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a49394ed-567b-45e5-ac99-09d3a83733ae/core_competence_of_the_corporation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/561b7b0b-15d7-4c95-8bf2-5348dcb24d80/lunilorefowumebuf.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC04A 20836 bytes
SHA-256: 7614bf7823c28135e512ee69d7ba22def3891545bdec41e0e7d24c3d90560c0d
font_01_sfnt_off000102f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F7 5440 bytes
SHA-256: c0bf02c630bc0357c9015afcc65da8bbe17e2acdfd707818f9413a5f211b4a7b
font_02_sfnt_off00011542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11542 12152 bytes
SHA-256: 882a40fb561931b4daf1bceaec0574a40d3679aa0bbd30f1719d611467522827
font_03_sfnt_off00013c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C58 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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