Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b47ddc2d8148c2c…

MALICIOUS

PDF

77.7 KB Created: 2021-05-30 22:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 856960bfa412d5e2157eb19093a4110e SHA-1: 750d06ef01948d1a3e89b7f775458d063e0f6fcc SHA-256: 3b47ddc2d8148c2ceb255449475d239c9b3ce1cae2001e695b2c5d31cf6c258f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on SEO-related domains and point to other PDFs, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=arduino+ultrasonic+sensor+led+project
    • https://xexomogaju.weebly.com/uploads/1/3/1/4/131438449/vonulosa_fapizunewe.pdf
    • https://toxujubew.weebly.com/uploads/1/3/1/4/131437446/4960734.pdf
    • https://cdn-cms.f-static.net/uploads/4485695/normal_601b9af94a13e.pdf
    • https://cdn-cms.f-static.net/uploads/4465938/normal_602d9ffe41c03.pdf
    • https://xezinazilasiza.weebly.com/uploads/1/3/4/3/134319357/miboz.pdf
    • https://menuwenuxunok.weebly.com/uploads/1/3/4/6/134682317/d660fb4.pdf
    • https://static.s123-cdn-static-d.com/uploads/4454421/normal_60b0924e1c682.pdf
    • https://nimaxosonoj.weebly.com/uploads/1/3/4/8/134897368/1556043.pdf
    • https://cdn-cms.f-static.net/uploads/4457604/normal_606cab806eced.pdf
    • https://xupatoxavivuni.weebly.com/uploads/1/3/4/6/134615471/a9d357e6eaffd7.pdf
    • https://cdn-cms.f-static.net/uploads/4426424/normal_6052e9d071d18.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/09085365-3a45-4a45-a44c-623eade1441e/puvunidexekoxuvegozibiga.pdf
    • https://uploads.strikinglycdn.com/files/8e806c00-ca5a-4224-9832-60e7930c1a88/82488162693.pdf
    • https://uploads.strikinglycdn.com/files/a70a1a9a-d786-42f6-8ef2-301b2f26982e/alcatel_go_flip_3_reset_network_settings.pdf
    • https://uploads.strikinglycdn.com/files/9a84731c-78a1-4b76-8c9f-72fcbb902231/after_book_google_drive.pdf
    • https://uploads.strikinglycdn.com/files/5862ad95-cd9b-42c2-a14f-5ea1847b1d15/zevopunelogisuwuwugole.pdf
    • https://uploads.strikinglycdn.com/files/96937220-2ffd-4515-8467-defa00e380f4/gofup.pdf
    • https://uploads.strikinglycdn.com/files/6052a588-b2bd-4688-b41e-83d462f09d13/wegolexozivevetipikokidak.pdf
    • https://uploads.strikinglycdn.com/files/6ba6503d-71ff-4b5e-b66b-1726613ce263/6703177324.pdf
    • https://uploads.strikinglycdn.com/files/a213b402-f832-4bfe-9794-26c77b1fac75/20626237335.pdf
    • https://uploads.strikinglycdn.com/files/4271315c-8ab9-46b5-82cd-7070808671da/23008851142.pdf
    • https://uploads.strikinglycdn.com/files/ba685fda-2819-4fa2-a589-a5ee6548d9f5/27119351183.pdf
    • https://uploads.strikinglycdn.com/files/b6ab96e9-31aa-4ed1-87b2-ef6bbd2a4e37/forged_in_battle_ww2.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3c7.bin
addbc509844a9bfdc1be37de7eb7d2aad94b668ad658b6f42a9eb7c96365eaf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C7 5132 bytes
font_01_sfnt_off0000e547.bin
18344d426500c921e4707c564cd1b5d7ebd12f69fd88e5f488d034333e83a779		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE547 2148 bytes
font_02_sfnt_off0000ef04.bin
280480d242f958ca3ccf2eb4e3d4d95603c6d03eaaaa7e3e3b02a118df60d235		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF04 10420 bytes
font_03_sfnt_off000112d7.bin
b1f5ea7eb6df56fdc2a0c8d605c92c3a2ccbbe74327d2aac8c0510abb85ec908		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112D7 16336 bytes

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