Malicious PDF — malware analysis report

Static analysis result for SHA-256 83f5c356cbef4ae5…

MALICIOUS

PDF

66.8 KB Created: 2020-12-22 09:04:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6057c5683ec2894bdbf66261f73316c0 SHA-1: ec213661386d303dd3a1027ea1c96bfcef08d708 SHA-256: 83f5c356cbef4ae5f1ebc9ae84e71710b38f54afd111fa3cecf5589e8e26b864
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, including a link farm, suggesting an attempt to redirect users to potentially harmful websites. The embedded content, though obfuscated, appears to be related to 'Parler social media stock symbol', likely a lure to entice users to click on the malicious links.

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 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.
  • 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://trafffi.ru/strik?utm_term=parler+social+media+stock+symbol PDF link annotation
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/luxulatodadesamipug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465559/normal_5fa65eaa43f7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493888/normal_5faab17d32b9b.pdfIn PDF document text
    • https://rilofope.weebly.com/uploads/1/3/4/6/134630674/danuzugu-kikafonusimulo-winopa-figegiva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lofese/58589375933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64fc5698-f1a5-41d1-b50e-c7fe13d8aa98/99014316878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f763f708-a32f-43d8-b474-feb828219589/the_final_inquiry_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af226218-1ecf-4add-aa1d-fbc99ac74e17/mixcraft_8_crack_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8b7f18b-0722-46b7-ad3f-6969a0224ba1/subevubenovoweti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1301f6a5-3d2e-4910-a02e-ff4251fb21d7/to_kill_a_mockingbird_plot_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/111483ca-cc95-4865-b2ec-455198cbf925/relative_frequency_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80ab2911-b6ef-4ee3-9084-7aacac1b84d3/33254929144.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/kitipisasexusimilemadazil.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_off0000c5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E4 5392 bytes
SHA-256: fe7dde9e61b724de36986ef31c65b21309494dc6a559d538d109da093374a457
font_01_sfnt_off0000d82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82A 11280 bytes
SHA-256: a90e159f3da93146a06d565621e0d8d347e9dd8509ab8fe83775d667199e6a47

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