Malicious PDF — malware analysis report

Static analysis result for SHA-256 a393188fa8a516a9…

MALICIOUS

PDF

80.8 KB Created: 2021-09-18 06:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: d3fc284d1498055cbe66ec5cbbbd75fb SHA-1: f7dda11c1ab33265c65f6ba4bca0e089d81c7429 SHA-256: a393188fa8a516a9de50540672c68bc12ce5bbfb92d4f0bfedb48a21d171c01e
176 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The document body is heavily obfuscated, but heuristics indicate it's a link farm and a callback phishing attempt. Several URLs point to compromised CMS uploads and disposable hosting, suggesting a distribution network for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://pusancard.com/userData/board/file/jasipasipagejas.pdf In PDF document text
    • http://metalzilembo.it/userfiles/files/burakuxaxamikekixot.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/39109215667.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/5038845570.pdfIn PDF document text
    • http://gdwtechnology.com/fckeditor/file/33738438809.pdfIn PDF document text
    • http://jj-metals.com/userfiles/file/2021090801334373499.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/tagatisolumixawuxumiluv.pdfIn PDF document text
    • https://karlholmbygg.se/UserFiles/files/86406449618.pdfIn PDF document text
    • http://erex.hu/upload/file/ruvonufifetiwurovawidun.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16140c95244410---46135954427.pdfIn PDF document text
    • https://okazionche.com/files/69870154863.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/nobavapanijapo.pdfIn PDF document text
    • http://quaisetoiles.fr/img_pages/file/wawubul.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132a1cb6053b---dewowuzapiwanubo.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/8377760602.pdfIn PDF document text
    • http://nuk-amro.de/userfiles/file/vodumeg.pdfIn PDF document text
    • http://mn-print.ru/ckfinder/userfiles/files/15449763840.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210908/file/zufiweperexavelu.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/93388637802.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/joxiror.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/neletugiruvolutuv.pdfIn PDF document text
    • http://dlugopis.kbo.pl/ckfinder/userfiles/files/42352021080.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/49653224871.pdfIn PDF document text
    • http://phuclocvienjsc.com/uploads/image/files/vutopimareb.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/5638qiogp5v7l26pgv7hr30p61/nusisokalovobaxovupaz.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/gupowijoku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=secure+files+on+androidPDF 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_off0000d82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82A 17336 bytes
SHA-256: 2d7075c2f417bc50bbf0c907f0a3a65f3cd02eb664897c50851b011bbe94df2b
font_01_sfnt_off00010532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10532 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D49 10544 bytes
SHA-256: 0801ffa33ded2504c88eaf1d0c75a1dfe1cb9e3aca561daab050819732fd7bca

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