Malicious PDF — malware analysis report

Static analysis result for SHA-256 5218519b04abb0e5…

MALICIOUS

PDF

72.7 KB Created: 2021-03-21 09:22:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cd6292e1ed1bfb91676416458ca36342 SHA-1: 92a7c662c87603cfe9d645636301499aa1f0fe7a SHA-256: 5218519b04abb0e5e5b072ae457d1e367e54be03449877091d67fc951bdc7769
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=john+deere+d110+steering+parts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474465/normal_5fd7dbfeaed55.pdfIn PDF document text
    • https://cdn.sqhk.co/duzefodaf/fjjgdnd/52336799801.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461763/normal_5fe4135421ad0.pdfIn PDF document text
    • https://donimafu.weebly.com/uploads/1/3/5/3/135395233/ac00e4870aa01.pdfIn PDF document text
    • https://vizokajobekaxa.weebly.com/uploads/1/3/0/9/130969885/pobipejodoxelu-nuresir.pdfIn PDF document text
    • https://kalepadakib.weebly.com/uploads/1/3/1/6/131637037/4665418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473062/normal_6056e4cca8677.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453118/normal_5fd7ea3ef2381.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487007/normal_5fc641288febf.pdfIn PDF document text
    • https://cdn.sqhk.co/sekijebasazi/fRizCgj/22637261963.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421354/normal_60037a645470e.pdfIn PDF document text
    • https://cdn.sqhk.co/woferomot/7NpkgdU/auto_clicker_ios_12.pdfIn PDF document text
    • https://cdn.sqhk.co/siwemawatu/ifJ7NDw/wosebisenigaguponig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_60341b6476fc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393515/normal_604b837ddc871.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/ce691e78-d7b6-4d3b-b4e0-cb1e6092bb03/82060336352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04074290-694e-4cbc-bc78-f3336e0af48f/sony_a3000_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1c88e01-47d7-4eda-8625-3b00200cfdda/sample_conclusion_for_biology_lab_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0468b853-83fe-4092-9624-fcf0271d392c/how_to_start_trading_bitcoin_in_south_africa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b10ebab5-7375-40c7-b738-19e95a0a8ead/how_to_increase_volume_on_acer_monitor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac784b1f-9d24-42ff-9e36-d4959dedf78c/autodesk_fusion_360_black_book_2nd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afab366d-90e4-4cbb-b2e6-d61675ed5f86/jesumujoropomoji.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_off0000e0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BF 5372 bytes
SHA-256: ce29268629fe5fb5caa27b01ef21d15ccf316b443cbff43578edb11d10d97e96
font_01_sfnt_off0000f2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FA 9652 bytes
SHA-256: 02efd203de23af25ae8777aea9fdaf2a00013a1c5b1b68bec4044f4eb8f20dd0

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