Malicious PDF — malware analysis report

Static analysis result for SHA-256 3019ab13a58451fa…

MALICIOUS

PDF

80.8 KB Created: 2021-05-25 03:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a4ddfd3059ea5551590376589721da46 SHA-1: d8bcbf8099b0b44719cf56a05daceb73c9f04a73 SHA-256: 3019ab13a58451fa4157c4ef5d99a7f64584ec708d07c6ea97c7891f1074d67c
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-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=wireless+charging+alarm+clock+walmart PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425924/normal_604a49bd11a1f.pdfIn PDF document text
    • https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/2379219.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454682/normal_602ad9468eb1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408186/normal_5fcaf352ce449.pdfIn PDF document text
    • https://wufikasuruxur.weebly.com/uploads/1/3/1/6/131636700/ddca582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375887/normal_605a8d2c2c47c.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://s3.amazonaws.com/jozaponi/aligarh_full_movie_hd_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/guidelines_euipo_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb338235-6e55-49f0-b9ad-08d9181df4ea/93139596657.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/mp3xd_descargar_musica_y_videos_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/reberinukobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/903ee006-6af2-4ec7-9ff9-730275a50bac/ariens_st1032_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10ea9cc4-71aa-417f-ac07-ba5bb3d8f82d/79164606194.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faaeef32-c86b-47bc-be2a-ec7016ae3446/97592808779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93487354-9f73-4566-af40-f399b6368776/garmin_nvi_1390_update_funktioniert_nicht.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b58a5334-4363-4f40-ab5d-eabaa6f6dc2f/hp_laserjet_p4015_fuser_part_number.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/bacho_ke_liye_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d536589-e09d-4496-9d61-c2e848b6bfcd/14398088855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90238752-4b8c-4d85-a712-c969691d39e5/fopaxorigabopezu.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_off0000f192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF192 5172 bytes
SHA-256: 102309c67918bbb6a8dcc766f32770bd7b388d03a510a3b53fbabacef53be036
font_01_sfnt_off00010304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10304 10884 bytes
SHA-256: f0376d109b34a6a450dae926735a656c856c6ae43340e1c7e9be61b1ef821b2a
font_02_sfnt_off0001280a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1280A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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