Malicious PDF — malware analysis report

Static analysis result for SHA-256 eccc261067216baa…

MALICIOUS

PDF

81.8 KB Created: 2021-09-03 01:44:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0aec214d1f4132b6012a377c6a4d23af SHA-1: 7e41943eba36573c7a16f0f07c47ce79529ca635 SHA-256: eccc261067216baa23e8d9cf1959ad9d8e00239e701bca06390cdaf91bc07c34
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to multiple external URLs, some hosted on compromised WordPress sites or disposable domains. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the overall structure and URL destinations suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • 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.
  • 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://almoheetmanpower.com/public_html/userfiles/file/76434221115.pdf In PDF document text
    • http://alrehabourhome.com/userfiles/files/neremosefadiduxaleni.pdfIn PDF document text
    • http://bwc.lt/i/60368012687.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/tefezutal.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/dfe8887079bd1e6b3ecc036df006ea44/49523744628.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bca2cb5c2ad---dudolitimunivisemudul.pdfIn PDF document text
    • http://dytac.hk/userfiles/zipijixopolis.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/83731916861.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160744e63e90cf---46989270049.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/bipakilidezuziwuxadorobat.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/95655920525.pdfIn PDF document text
    • http://ideviceplus.be/app/webroot/files/userfiles/files/68731265497.pdfIn PDF document text
    • https://feldmann.pl/userfiles/file/59401100690.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/dalugamovajitenarujex.pdfIn PDF document text
    • http://short-story.ru/upload/file/wimasilo.pdfIn PDF document text
    • http://ambulatorioveterinariorigolon.eu/userfiles/files/21487951639.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b06c31be563---48230458240.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/c1d59318775cb0c7b93bc8e0914d2fa0/divopomojetimakalixot.pdfIn PDF document text
    • http://gandolfiarchitetti.com/userfiles/files/dozukazepebuxasiki.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/wevuverazijinuze.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210702065914_oglc65.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/bukeduvolurozamija.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/varirowaporepekiki.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/fafewivedejopexiguxi.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1dbca6d88---34231915294.pdfIn PDF document text
    • http://wongkungfu.ca/clients/f/f5/f5c316b966f29b3192b3e9e3c5714b3c/File/nujometovegabazutef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=dane+rudhyar+the+lunation+cycle+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC64 10764 bytes
SHA-256: d8f19fb0b85cd1e3601f1efdfb055f5580958fba1fb728ed5824ad5ddd085320
font_01_sfnt_off0000f50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50A 17092 bytes
SHA-256: 27cdfa574de1bb3620fed72c7f90be094cf4c98552169853a966ea1bf05b6f6d
font_02_sfnt_off00012119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12119 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1