Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5f71854f090e1ae…

MALICIOUS

PDF

67.7 KB Created: 2020-11-25 05:43:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ef6d14ae31dcba20d53a6a41648ddf55 SHA-1: 483eb5d1678719fb4f72e1433f8e314339e308cf SHA-256: f5f71854f090e1aeeb5b32ac35db84041824b3642f7219d8c565b971f4ccc1b5
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 0.9998

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://traffine.ru/strik?utm_term=shark+steam+mop+replacement+pads+s3601co PDF link annotation
    • https://bixanizutojez.weebly.com/uploads/1/3/4/4/134490846/rokiwe-mezozizivamupav-sudaxigixeluton.pdfIn PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/2457011.pdfIn PDF document text
    • https://dipitamadupod.weebly.com/uploads/1/3/4/8/134882687/sukozedikef.pdfIn PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/5d91a7338b.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/saxefi/coronary_artery_disease_guidelines_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dd696d2-4f12-4bda-8082-9641275b9841/jaginifafapazagorinu.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/batikikarokorixuxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bfea320-3768-4182-9dd4-a73249c29b7c/61391825472.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/mupukuvuradis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d650d3e0-3fab-4adf-b1da-9d524fcee68b/setiwexovofilovaweduwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22e0c590-da93-453a-adf8-535cf1321c43/fegas.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/road_hog_4_console_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f19c4178-8d95-444c-ae5c-d9d84fd55d47/51572970330.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/7519340842.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_off0000c9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E5 5992 bytes
SHA-256: 8c4186af2675bf1a675dcec7730f3194c40296c6047db9736456e4a96d05670c
font_01_sfnt_off0000de1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1A 10428 bytes
SHA-256: 0566f403a73e118f003528b82867dcd50c0cea41bc3caa2de11a4d152cd908af

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