Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6a45eb7039e9250…

MALICIOUS

PDF

65.0 KB Created: 2020-11-14 10:41:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8354a586cc8a6c44b3db1ae768e9148b SHA-1: e8689ed094a79c5867c54f6df9850b3bdd308cae SHA-256: d6a45eb7039e9250b7148617572b97adf880ad542c7630888855d3f16fc089c6
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are to unknown or potentially malicious domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to harmful content.

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://trafffe.ru/strik?utm_term=reflexiones+diarias+de+aa+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410006/normal_5fa5c0a6db37c.pdfIn PDF document text
    • https://wavixupenug.weebly.com/uploads/1/3/4/3/134386336/fifirinot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410462/normal_5f938306699af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373797/normal_5f8a1b8496fb4.pdfIn PDF document text
    • https://ravidaxixow.weebly.com/uploads/1/3/4/3/134315840/pavaja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5f8a07527a2f7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebfafaa4-9c0e-408e-9aee-cd4bfbe408f7/suayed_acatlan_unam_mx_sae.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/serco_pitbull_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/147718254.pdfIn PDF document text
    • https://s3.amazonaws.com/fulomufimikim/kujimivezilidirifewixul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bf3c1f5-26ab-412c-8533-4c393cacd267/53487186299.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/zowegotebarunabej.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/venixivevubajuzopigosawav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74646d47-7793-4220-b972-6cd9e1d8b274/fijunugexagudasevibutu.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/regular_verbs_simple_present_exercises.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_off0000c07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC07D 5112 bytes
SHA-256: 382e89da7699d6687305da4f08eecffaafc39b20aabe3e88ecd100fd9e2fe74c
font_01_sfnt_off0000d1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FC 11408 bytes
SHA-256: fce452f3a692c9136507c6bfeda01bc9e5de7faf2cb6ef5a74824963b6f59940

Open this report in the interactive analyzer, or submit your own file for analysis.