Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba89d52228453c9b…

MALICIOUS

PDF

84.3 KB Created: 2021-09-08 06:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: eebf99b5a725acf4bff118692cab230c SHA-1: 1e7511a0cd84ea132cf1c4d4219e784e8eb4a0ba SHA-256: ba89d52228453c9b6fe33c6f08a8d2988ce190a68a40c720c1e4496e460a5579
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, many of which host further PDF files. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://gfhs1978reunion.com/clients/56625/File/lotezedeju.pdf In PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/5c49050ad782cb57fc2d5dcf7bf13c74/87804077709.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/2411cc5a951e00d94b15320798fe2d78/24811679608.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/somoxamikizovelamufet.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d1355d1b6---puzilemefiduwagokom.pdfIn PDF document text
    • https://biharlokmanch.org/userfiles/file/92258656729.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae5c74f60a---vefasasedapegitip.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/nojotibaxevixeda.pdfIn PDF document text
    • https://thehouseproduction.net/file/41207063587.pdfIn PDF document text
    • https://cobrawire.com/userfiles/files/rosoxiwevivagamorale.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/kebiwalonixoritemetotek.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a5ab1be81f---92399591782.pdfIn PDF document text
    • http://ubest.ru/images/file/47415966613.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/voxazulinumajavu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3368daac2c---pokabajuditasokinideviged.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/juteganarefanizilafaze.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/43081a30d911d1ac5fcdca81651d9277/mudebudigub.pdfIn PDF document text
    • http://nissanotogovap.com/uploads/images/files/56286770444.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/47966639550.pdfIn PDF document text
    • https://olterus.com/contents//files/kutalunoxinizazodevisefa.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/d72350422a6213ede5fc931bfdedf44e/buterirosomijet.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/fiderimoxeredaweto.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/61145626650.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=norma+oficial+mexicana+026+cirugia+mayor+ambulatoria+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1B 11640 bytes
SHA-256: 1587f554263a86ee7cfa1575c63f86872c584f689f80a9f550b4d86fed3b97ec
font_01_sfnt_off0000f873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF873 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11085 20012 bytes
SHA-256: a7212a36f0075b41f9c123d68a0784edb576695457a553c3ce8ffdb993590888

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