Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e07f8978348f76…

MALICIOUS

PDF

77.6 KB Created: 2021-09-04 23:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 99145f146cdf26f8f3ba6f1f4e68d26f SHA-1: a02e08cd4fdd780b2b93ed824eb71c1525961dd2 SHA-256: e5e07f8978348f76b59cad825e19e908da4f7dc2a14e534354f541e7dc990300
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to external websites, many of which appear to be hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to distribute malicious content or phish users. No scripts were extracted, but the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://altaprecision.com/userfiles/file/48412010541.pdf In PDF document text
    • http://okuninka-biale.pl/userfiles/file/biluzuvekite.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5298146693.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/78352f6cfd4297aad9792bf099e98b77/kiwajuvisabatekugoverug.pdfIn PDF document text
    • https://feldmann.pl/userfiles/file/kodewigoxafizuzara.pdfIn PDF document text
    • http://gpba.ge/admin/ckeditor/ckfinder/userfiles/files/todiwes.pdfIn PDF document text
    • https://www.hsbofmn.com/ckfinder/userfiles/files/72065120475.pdfIn PDF document text
    • https://www.luthier-auxerre.fr/ckfinder/userfiles/files/14111910920.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/62782421210.pdfIn PDF document text
    • http://lesen-und-schenken.de/userfiles/files/10399089349.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a243a1a94a7---jepufolefolopusadexo.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/gegarola.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/liribaxabuvubuserodapake.pdfIn PDF document text
    • http://rld-carbon.ru/file/mewuwefiturizis.pdfIn PDF document text
    • http://phuvuongcorp.com/luutru/files/diluxegabojos.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/63275446946.pdfIn PDF document text
    • http://areaengineeringsrl.eu/userfiles/files/noziwemetil.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/97a882282be1331915877d92a33851fa/dazukifa.pdfIn PDF document text
    • http://aqs-group.it/userfiles/files/14782199563.pdfIn PDF document text
    • http://bwlpsalisbury.com/uploads/files/zikugobosunupur.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/72956141816.pdfIn PDF document text
    • http://vangphutai.com/images/uploads/files/pefixudiroropolikuxuruse.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=timing+pulley+catalogue+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_off0000cb82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE399 10872 bytes
SHA-256: 3ff140b02d2725eae1fc18705553fa5c0fde55be27ba7796f0c58218ded666a3
font_02_sfnt_off0000fc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC87 17208 bytes
SHA-256: a28c12e2ad0a7a57a397b6fda52bf51650e41fbe70a8c650e81bb772b008464a