Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3689f030cca1e3c…

MALICIOUS

PDF

83.6 KB Created: 2021-03-29 07:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 090cebf505bb98fc6a7125aaed701026 SHA-1: a87fbaf55b914e08c89a22175f61a1a911f8de11 SHA-256: d3689f030cca1e3c4a1aacc3b826dc782a5dcb4b823e5722be3865489ca188f5
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files hosted on file-sharing services, indicative of a link farm or phishing campaign. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, suggesting the document is designed to drive traffic to these external sites. While no scripts were explicitly extracted, the presence of numerous external URIs and the ML classification strongly suggest malicious intent, likely for phishing or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/strik?utm_term=quran+in+english+and+arabic+free+download
    • https://kikebepuziji.weebly.com/uploads/1/3/0/7/130775256/tiwejevap-mepaxidogizavon.pdf
    • https://pebuzifidam.weebly.com/uploads/1/3/2/8/132815752/05aede492ef7ab.pdf
    • https://wisiwojapano.weebly.com/uploads/1/3/4/8/134896472/349de.pdf
    • https://cdn-cms.f-static.net/uploads/4369525/normal_60325a0d58617.pdf
    • https://static.s123-cdn-static.com/uploads/4465274/normal_5ff5001bcaab2.pdf
    • https://nenojidadexodu.weebly.com/uploads/1/3/4/3/134351563/sufojuvago.pdf
    • https://static.s123-cdn-static.com/uploads/4408712/normal_5fcb60b8a2657.pdf
    • https://mapuxotegudu.weebly.com/uploads/1/3/4/3/134356271/8081451.pdf
    • http://pusudekevuwew.22web.org/26273624740.pdf
    • https://jenazikefu.weebly.com/uploads/1/3/4/0/134017187/900210.pdf
    • https://static.s123-cdn-static.com/uploads/4374002/normal_5ff9428feed63.pdf
    • https://jedifubebevaze.weebly.com/uploads/1/3/4/8/134873515/1879897.pdf
    • https://cdn-cms.f-static.net/uploads/4409123/normal_601842f11e450.pdf
    • https://motoburibekisi.weebly.com/uploads/1/3/4/6/134623685/zowamepulopoxu.pdf
    • https://sarogixi.weebly.com/uploads/1/3/0/8/130813770/burojim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8b05c2f4-07f7-466f-ba37-160ffd65fddc/10990364356.pdf
    • http://wuzugimekiwetad.epizy.com/javupem.pdf
    • https://uploads.strikinglycdn.com/files/bc4d6635-c6bc-4689-b321-78d04a86bd95/tijafaporig.pdf
    • http://vofogidazok.epizy.com/46934954080.pdf
    • https://uploads.strikinglycdn.com/files/1c2bc365-fccc-472c-b942-f63b24967b23/8311852717.pdf
    • https://uploads.strikinglycdn.com/files/6db23116-6328-4b9d-af81-3b7b8a9ebaf4/bakopeju.pdf
    • https://uploads.strikinglycdn.com/files/5d939788-dd46-4ffa-b859-704a67cf2970/98756487293.pdf
    • https://uploads.strikinglycdn.com/files/4eefb6ef-b611-40c2-b2c4-c5d0b73bd80e/dyson_dc25_vacuum_cleaner_parts.pdf
    • https://uploads.strikinglycdn.com/files/abf7faf6-6d56-433b-8f89-39b64c16e6ce/embedded_c_programming_tutorial_microcontroller.pdf
    • https://uploads.strikinglycdn.com/files/8d5b0e89-f14a-4892-a6fb-6128275debb4/lirusufosapimajata.pdf
    • https://uploads.strikinglycdn.com/files/fc990698-c000-44c8-9e16-1c10c12f491f/rurebolamorilemaruronu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddb4.bin
6339ea4ebccaa8cd357ad65961783d7e86540b8b234149a3246a3e19d2a930d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB4 5576 bytes
font_01_sfnt_off0000f0b3.bin
9f163e3b386a793399ed97245a34d484a44c21a562a3344d7d183a8c28fac166		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B3 10716 bytes
font_02_sfnt_off0001156c.bin
7fe562c12efc6f44076aee6ca7ab290766c0f81ca5bb6744d476af93efedf059		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1156C 22808 bytes

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