Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c325b328197e571…

MALICIOUS

PDF

85.2 KB Created: 2021-09-04 05:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4966df71fd120bc4350fa3478ba301b0 SHA-1: 93c61fa46b98dc095a136a3e29bfe54006ffa082 SHA-256: 7c325b328197e571a93ab99e818114987597085fa4f2da93d6e28254fd2bca7d
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, many of which are hosted on compromised CMS uploads. The PDF structure and embedded URLs suggest an attempt to exploit users through deceptive links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • 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://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609d14a7bdd36---sazulokadamijuxamuxij.pdf In PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/rurulaverukokazige.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/65554i473k25gk0h1ghakimpl3/32952261350.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c14d53174c3---sefimum.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/84829032526.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/puvudebofariligumetogume.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/d4e682cdc3dd2fbc0b31cb47c9e87a3c/9615343912.pdfIn PDF document text
    • http://soupworld.de/upload/file/xanirefodesitigivusofewa.pdfIn PDF document text
    • http://romento.com/uploaded_files/userfiles/files/soxur.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/wulofosodavixomuwofofawuv.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/podiwuxewujozasuguxabejo.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ed328dab9---67731692291.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/fqcrnuala1sh3ofjrubp1gi5c6/verekufozakasaj.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/o1eej5kn868c2n4et677dkh56s/3415029965.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/85229663485.pdfIn PDF document text
    • https://wintechindia.in/ckfinder/userfiles/files/saxopesubex.pdfIn PDF document text
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/kojixafoneleditametaluj.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160725ac9dcbc7---wuwimutuduwetavarote.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/xiloxa.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/31ad4d32e48d8c16650ab9322aa8d38f/42482365840.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/62300600481.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/wusaroperaworilewikefu.pdfIn PDF document text
    • http://gtshotel.it/images/file/90050189388.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=kierkegaard+pdf+t%C3%BCrk%C3%A7ePDF 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_off0000e5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F0 18984 bytes
SHA-256: 1ba237aef09531b1eb73a06ea7f13710d7ce99cacdc200e516056eb36b7098c1
font_01_sfnt_off000114b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC9 10708 bytes
SHA-256: 397255ff2db77b8e5bf22d57916c9bdae98512270779b2311ae725b600d37a66

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