Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a89e2a7c4e47b6b…

MALICIOUS

PDF

89.4 KB Created: 2021-07-24 10:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3c1d858673496b03ffb063c4ac7c53cf SHA-1: d61b432f1b318ef82d60517ddc365dc85a58cffd SHA-256: 3a89e2a7c4e47b6bb5f38fb9bd46494b2e5b3b2a81184f64cf386d2604d0304a
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document employs social engineering tactics, specifically a 'Browser Install Lure' and a 'Clipboard Command Lure', instructing users to install extensions or execute commands. While no scripts were directly extracted, the presence of numerous links to potentially compromised websites and the nature of the lures suggest an intent to download and execute further malicious payloads or steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://candientuvibra.com/images/file/42498538563.pdf In PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/ckhkm2svjaa4fenmsj74e4kd65/36710986918.pdfIn PDF document text
    • http://nbpcpentecostalchurch.com/clients/65183/File/pudulonejogomoremewugomam.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/tutuzonogixukokagafe.pdfIn PDF document text
    • http://watch62.ru/files/files/91292303688.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/gurigotibelururufa.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/birusedevisebejizut.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/a054fd1d3ca1d03429cc76ebe4d394c1/19432198593.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/d04e64d2d1b85eb272d8b57af22ad7df/tudoviliwaxinevo.pdfIn PDF document text
    • http://kerrya.com/ckfinder/userfiles/files/juginizabiz.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d8c6503f8---11678058228.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094451c7d25e---juwesekexamufutugukoveb.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbd98c394b---59773070468.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/53995151407.pdfIn PDF document text
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/tamutaxalunotalisomovi.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/pajumusutedusutafoji.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983e287f64b---46725793708.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/vojijulezigufa.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/57916571580.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/birepiwawufigijawit.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609439a9105d0---64979067040.pdfIn PDF document text
    • https://andrejc.si/files/file/wamidife.pdfIn PDF document text
    • http://z500.si/files/mavasetalejewomonititob.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1af0b3bf32---42367025256.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/s41lf6nnvootd9l8h40tvopra2/dimuwanumiwokavisejukuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=convert+dav+to+mp4+free+macPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AC 16944 bytes
SHA-256: 7844ef08e946a435a7fc00c9860ea3f66198542581d0762ed4e6d75d5ffcc002
font_01_sfnt_off00012613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12613 10652 bytes
SHA-256: 5b305ce7cd7b2596e023e66976a5b60fd3b3462335fccd8b7d4faef53a63358a
font_02_sfnt_off00013e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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