Malicious PDF — malware analysis report

Static analysis result for SHA-256 f352fac674861195…

MALICIOUS

PDF

79.6 KB Created: 2021-03-29 20:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b1cf83c64b0b2c3b74729e6ad66c8c3f SHA-1: d86323e0a5918e0033f0055a1987f31a1a9cb0fb SHA-256: f352fac674861195d85b563ab2527ee84b07925521c9fc94caa045f7bad66a17
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • 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
  • 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://dugedepap.ru/123?utm_term=all+pokemon+games+for+ds PDF link annotation
    • https://pamaridefudeluz.weebly.com/uploads/1/3/0/7/130776324/5185627.pdfIn PDF document text
    • https://cdn.sqhk.co/pozedezupase/ibgjcVd/data_management_dictionary_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422879/normal_6025b06b47ce3.pdfIn PDF document text
    • https://gosabejeda.weebly.com/uploads/1/3/1/4/131453015/fajur.pdfIn PDF document text
    • https://cdn.sqhk.co/bufomofa/dQhcUeU/kixegefagigekegipinubi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452377/normal_6049f28a256f9.pdfIn PDF document text
    • https://loloxemevo.weebly.com/uploads/1/3/0/7/130739498/4711386.pdfIn PDF document text
    • https://jimivisimobud.weebly.com/uploads/1/3/4/9/134901817/jimexan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369189/normal_600f1f58e8664.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbd54891-e213-4c5a-a255-9cfdb7fff5f4/89768341276.pdfIn PDF document text
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_8ad1344f002444b19b910121b100ebe3.pdf?index=trueIn PDF document text
    • https://e905e09d-7ddd-4aab-833c-73500e817873.filesusr.com/ugd/f4c08b_5c3d474acf3d43e4911a86ddb6c0e5c1.pdf?index=trueIn PDF document text
    • http://wesufonezis.epizy.com/jikujopexizelezemuke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e705aa18-2b16-4e9d-8412-51053dbe0ce4/rukejo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/652347d0-f877-474b-8659-b8f6c5699fce/penoxixesatewod.pdfIn PDF document text
    • https://383fd46b-cc41-47b7-9379-19c19d7bb1fe.filesusr.com/ugd/81c43a_60fb82caf8e84166ba6546fd57586cf7.pdf?index=trueIn PDF document text
    • http://sobogelutox.epizy.com/cctv_camera_for_pc_free.pdfIn PDF document text
    • http://xaduvegovoz.rf.gd/love_yourself_answer_all_versions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53872a7e-b16a-40c0-85eb-589c66b91e6c/label_line_in_plot_mathematica.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_off0000f870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF870 5416 bytes
SHA-256: ece6510b2b0d61249b571da484a3d5807817eaf219f51b34f3d38ced41ea1439
font_01_sfnt_off00010ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC8 11424 bytes
SHA-256: 5aa8b9c4c7df3d44db6ad48c644b41cbdb7e55e22aaf4905d67278913ba8f31b

Open this report in the interactive analyzer, or submit your own file for analysis.