Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d6b92fd5d5b149…

MALICIOUS

PDF

71.6 KB Created: 2021-04-21 23:35:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d35247913e9334911d3c2bf0815278a5 SHA-1: f37ebe7f3f645caa15b21f33189b4cef13a3dc44 SHA-256: e2d6b92fd5d5b149eb5e46b0fee16879966e1e83db4e5f131e4088bfbc266f26
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it contains external URIs and acts as a link farm. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://ponafet.ru/strik?utm_term=how+to+train+your+dragon+2020+calendar PDF link annotation
    • https://fitetusoxesar.weebly.com/uploads/1/3/1/4/131406062/efe537fb9a3e53c.pdfIn PDF document text
    • http://zomenonezuzup.iblogger.org/turning_page_sleeping_at_last_piano_sheet.pdfIn PDF document text
    • https://xutorobufazam.weebly.com/uploads/1/3/5/3/135345650/4ba8ca2112ef5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4eb3a9b5-ca6a-4b2a-896e-878abc754f3b.filesusr.com/ugd/f1ab86_60e37257933d4840b0caf905b9008e42.pdf?index=trueIn PDF document text
    • https://a540aa65-2eb1-4ac3-86d0-bf6a54daac96.filesusr.com/ugd/2d797c_19010faa64ce45439ba7e59ba7261881.pdf?index=trueIn PDF document text
    • http://galexuduxegi.epizy.com/25042961706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9484cc67-bec0-4b2e-85ac-fe9113ae6c66/arcana_evolved_5e.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/burakew.pdfIn PDF document text
    • https://d12e84a0-9808-45da-82c6-613dfe540d1b.filesusr.com/ugd/dc8a8e_ee19c952d3fe4d028cafc8e56209ae19.pdf?index=trueIn PDF document text
    • https://c4647614-9ff8-4b00-b819-08dc938bd166.filesusr.com/ugd/5d3f24_d6229cf97316438282fab3b13d38e5d5.pdf?index=trueIn PDF document text
    • https://e668d0bc-6b9c-4787-ac64-5363b724ef62.filesusr.com/ugd/6ec699_371e619b3cea4ac5966efd2822c5948e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fda63adf-1bc2-4f5b-992c-7f841506b7f6/64258112919.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/programmable_logic_controllers_ebook.pdfIn PDF document text
    • https://1c514d3f-4aca-4c14-a2cc-94ef866bc6c7.filesusr.com/ugd/860217_9c4c847efb8c48008a775c32a50992e8.pdf?index=trueIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_2c7dec52ddc640618176b5595fe274a3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/detroit_become_human_pc_game_free.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_off0000d8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BB 5360 bytes
SHA-256: 4a7567725d7d02bfbb97a85e0a0eb89840181ff36ebb25829c40746611148bf8
font_01_sfnt_off0000eb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1B 11272 bytes
SHA-256: fa289a3088476da1544a64e1e1e6038ba36aaf7be074c3080f0bb32d7f3cc803

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