Malicious PDF — malware analysis report

Static analysis result for SHA-256 393a67332a95d21d…

MALICIOUS

PDF

85.2 KB Created: 2021-09-10 03:26:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b2d555faeacbe1b6c4e50fbf0abae576 SHA-1: 07bff5104cf4c8cac786fae76476e44b18f08f28 SHA-256: 393a67332a95d21d8de5a0224b1ced5af07dcdd73a6c0c45a6ee6b971b841b87
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for executing malicious code. The file also features a link farm pointing to multiple potentially compromised websites, suggesting an attempt to distribute malware or conduct phishing. The ClamAV detection and ML classifier further support its malicious nature.

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/7e882da522677d7fe0f099757a46b562/zaxasuxil.pdf In PDF document text
    • http://flyingwedge.com/uploads/assets/file/sulovelafekidulumu.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/finaxujevoxo.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/kopawuvatoxagegemudozoz.pdfIn PDF document text
    • http://factorycontrolprojects.com/userfiles/file/74414419132.pdfIn PDF document text
    • http://orem.mn/uploads/files/67795579789.pdfIn PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/3579093297.pdfIn PDF document text
    • http://ideal-site.ru/userfiles/file/nunanelunuju.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f739279d3---60251700997.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/18265173122.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/74731744771.pdfIn PDF document text
    • http://iccjsc.com/images/uploads/files/vibexuwejub.pdfIn PDF document text
    • https://elger.cz/fckphotos/file/49208866968.pdfIn PDF document text
    • http://scarpatti.com/files/91563475124.pdfIn PDF document text
    • http://stigstudiotecnico.it/userfiles/files/49396999601.pdfIn PDF document text
    • https://ymy-tea.tw/upload/files/xurekegovuparuruv.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/budotetibelunuz.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/75053568424.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a725fd1629---fupazopi.pdfIn PDF document text
    • https://sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/54798490332.pdfIn PDF document text
    • https://www.orthovision-lublin.pl/ckfinder/userfiles/files/gipuxel.pdfIn PDF document text
    • https://coastalholidayproperty.com/ckfinder/userfiles/files/22287895515.pdfIn PDF document text
    • http://tajilin.com/upload/files/rezakudojivumitalezuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=c+major+scale+guitar+tabPDF 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_off0000e678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE678 10868 bytes
SHA-256: c6be8b8452801ba046cc3aaa3d562524b1e61ae5ea634acca2800929782b44df
font_01_sfnt_off0000ffa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B4 18312 bytes
SHA-256: 56c0ca1162b3b3e64087742ad7b48df2261a931b57e01bfcadf1c1d9455be584

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