Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd14e480f3f43a16…

MALICIOUS

PDF

79.6 KB Created: 2021-09-23 08:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 864886194a0712e882204806da60ed63 SHA-1: 19c8443923c9308182a8a2cee9bbebcd00d4bc51 SHA-256: fd14e480f3f43a162b5cfa74ea430697541a25197e75ee2e2112b85214cfbe4c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as 'Pdf.Phishing.Trojan'. The document exhibits characteristics of a link farm hosted on compromised CMS uploads, suggesting it's part of a phishing campaign. The primary attack pattern identified is a callback lure, where the user is prompted to call a phone number for a fabricated issue, a common tactic in tech-support scams and phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614963a77a36f---pumazijoxumemuritaxu.pdf In PDF document text
    • http://bigbazar.cz/is/images/FCKeditor/File/bawegaxojexegixidab.pdfIn PDF document text
    • http://labonscafe.com/userfiles/14563038929.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/ripifotigujijorolusevi.pdfIn PDF document text
    • https://vaitinhdien.com/app/webroot/upload/files/dizimebosu.pdfIn PDF document text
    • https://specialgarden.ro/userfiles/file/98741998143.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1614c00c6b52b4---getapabedilumoxidu.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/wopadadawufuxotap.pdfIn PDF document text
    • https://dubaimotorcycletours.dubaimotorhomerentals.com/uploaded_images/files/6958897706.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/vewenalavorukame.pdfIn PDF document text
    • http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/48502593870.pdfIn PDF document text
    • https://learnrkbin.jugalbandiresearch.com/ckfinder/userfiles/files/zalikozisasiwe.pdfIn PDF document text
    • https://vinacomvietnam.vn/uploads/news_file/tumotezomejedero.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/tolofexevaleful.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/fivapimatena.pdfIn PDF document text
    • https://luckysurface.itweald.com/uploads/files/6144da3d57167.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/surediwizewijibunafejiju.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613ecfa2acf35---jepor.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/a8497bb9fce3b293c978fb094b290fc3/rodamonogur.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/97316781167.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/75574373955.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/paralalar.pdfIn PDF document text
    • http://choragwica.pl/userfiles/file/44535865786.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=gta+5+all+cheat+codes+pcPDF 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_off0000d320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD320 10488 bytes
SHA-256: db4ee9c26b64c999f37ad59028e1a56cf44d415b60078dfdfa44ffe2609ce13f
font_01_sfnt_off0000eb37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB37 17500 bytes
SHA-256: f87769a835763592feaa95f4cfa56d3610e66255bbc8a09f1c89bdf9a670670f
font_02_sfnt_off00011896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11896 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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