Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2fda74fa2424ebb…

MALICIOUS

PDF

142.6 KB Created: 2021-03-21 09:27:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 658cff109e36edda0c5860e9cb8b9dee SHA-1: eaadf50f4fa49e682975ad0498fc090c0b91e781 SHA-256: f2fda74fa2424ebb56a19883d8570816603cc354d80b9ccf71ecd3b5b14eff43
244 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to external resources. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically `https://yafferge.ru/wix?keyword=rocket+league+random+shot+generator`. Another heuristic identifies a large number of external PDF links, suggesting a link farm designed to manipulate search engine results or distribute malicious content. The ClamAV detection and ML classifier further support the malicious nature of this document, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • 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.
  • 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.
  • 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://yafferge.ru/wix?keyword=rocket+league+random+shot+generator In PDF document text
    • https://cdn.sqhk.co/zozotetowa/ibhbRij/driver_asus_x455l_windows_8.pdfIn PDF document text
    • http://sinoxaju.mygamesonline.org/gowubodugevejezusuzarujot.pdfIn PDF document text
    • https://cdn.sqhk.co/gukawaki/iz9igaU/aardvark_i2c_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/diwamukef/ghb024Y/galem.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/jihlFhh/tumblr_lights_words.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/texas_sales_tax_rates_by_zip_code.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407996/normal_5fe2402749ba6.pdfIn PDF document text
    • http://bajesiradevo.getenjoyment.net/85254306260.pdfIn PDF document text
    • http://rolivazugatar.scienceontheweb.net/do_you_capitalize_than_in_a_title.pdfIn PDF document text
    • https://cdn.sqhk.co/gujamozulas/ScP7Xig/poworedujujolomobajaguv.pdfIn PDF document text
    • http://bugilinupapud.mygamesonline.org/kebivexotaduzedo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386609/normal_6054e1156186e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_175bd3cef8bd467cbce09f1ddaafd7d9.pdf?index=trueIn PDF document text
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_522e79112c93424194795e0a3d37c716.pdf?index=trueIn PDF document text
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_2aa83562ba0c4ad5aab04d9f21ca7213.pdf?index=trueIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_9e56782706fa478696792691621f825e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xomudufe/mipazobujekukibil.pdfIn PDF document text
    • https://7b9449e5-51e9-4a7e-81f5-8587c42320f9.filesusr.com/ugd/571bad_62d5ee7659c84b01893f4944275bad1d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ginutu/add_files_to_wix_website.pdfIn PDF document text
    • http://zovoxasus.rf.gd/alinco_dj-500_programming_software.pdfIn PDF document text
    • http://dadokupokumudav.rf.gd/6453730173.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_off0001dbfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DBFE 5424 bytes
SHA-256: f9ae129d1a4c7ffcc9eac7f10d52bc376ab85512c67f12875cbb7b99a213e720
font_01_sfnt_off0001ee49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE49 11952 bytes
SHA-256: b96df1eebd2c7492273fc3800993cbc5a25fd9862d8eea172373c8f2be88b0f7
font_02_sfnt_off000216b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x216B5 16168 bytes
SHA-256: e5458d7b6d82539349b17fc4713a17e1381d471255c72d9f8116b7c86e08c443

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