Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f6b84760da90700…

MALICIOUS

PDF

75.9 KB Created: 2020-11-20 07:01:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b6adc0a0da85e2ddf1ef5de7d1436b81 SHA-1: 9ba8c6386b9757765ab78a4f5275b63a8cd56d92 SHA-256: 2f6b84760da907001686f4563fa8e1b86d9c9a35a19ab889e65de3b3b972dc49
156 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 0.9997

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://traffking.ru/strik?utm_term=blu+ray+player+without+cinavia PDF link annotation
    • https://nidiladidubupa.weebly.com/uploads/1/3/4/7/134753920/94be799a8ff810.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/6a0cd0630e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412899/normal_5f96c6954b512.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c7806919-d3b1-412a-9864-3977135eb3c0/ark_breeding_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4999f55-c75f-4494-af2d-5237e2c64225/kevokodumebojed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b90ff2d-0af9-4e36-bfeb-43e7842a2a0c/algebra_linear_callioli_livro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3815720d-18e1-414a-b1ed-e1389e1007ec/64891429730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5226454-d66c-4e01-a937-51d10cf82bae/galavuzef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e87d51b-3d95-4859-9c4b-06c4ba60c9df/programa_tercer_grado_2011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8783294-70c1-4c0f-83fe-25ba9eae478c/36538900705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/428a107b-d7bb-4a61-8e03-11da89ce5c55/67164296009.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9777b88-851d-4407-a4a2-04d19d77aaf1/ralipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df90e899-66b5-40b6-8f36-0418451744c0/federal_power_act_205.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBA 5028 bytes
SHA-256: 8fdb6ba1f4d68e0ca57ac874ad77afe20b8650042faeaa6d45c404ff5f23ee3e
font_01_sfnt_off0000ede3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE3 10948 bytes
SHA-256: b0bed49bb2ec665c9e4d4772f6e90e58990b116876eb09f9705839aacb4bab2a
font_02_sfnt_off000112e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E1 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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