Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf7dcd9ab8396e6…

MALICIOUS

PDF

83.4 KB Created: 2021-08-16 13:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 269741bc7870cc9885db1aa1904cddfe SHA-1: 4ef2beb18fa1387308761dd87aeb7a14f4e2c1fa SHA-256: daf7dcd9ab8396e650c8fbd3cb9cac5b78d854da90a8d36a6744cceb61fc3ec3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many embedded URLs pointing to compromised CMS upload directories. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 http://sharise.net/Uploadfiles/files/bikugekezujopoduxe.pdf In PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ba38e5669---xakubosuguzaduz.pdfIn PDF document text
    • http://abworder.com/uploads/files/4294055767.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//87333082665.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfe366dd64---nudabafotenuribiwegemino.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/2b6dcfe54115d03dd861a78fe758aa85/77026243372.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d01bd955c1---kotusuzozora.pdfIn PDF document text
    • http://sharon-barron.com/userfiles/files/6430454524.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/jilemol.pdfIn PDF document text
    • https://agatanorek.com/files/file/gewolofixuvujelejor.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16088165c7ccb6---78711747129.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/debixezaxekemixegadipiz.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/99055074496.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/bixebe.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9d4bd0156---kimukazomopax.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/595653b3548aa8058254938be0f11977/fejetewufukuvodefizupi.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/bazuwebutorulovuw.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/6f0b8657e503bb27cdd6b7796407081f/matilededikorikusexo.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/89459238364.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f5168ed86---kifepebediwewuxo.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a63f2b01480---55846636654.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/futonaju.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16098341abdddf---39508962947.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/90d43893c75b3e86d8ab00b0232e0a1e/nukofeketas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=what+are+the+consequences+of+climate+change+for+our+weatherPDF 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_off0000e280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE280 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA97 11108 bytes
SHA-256: db02abd718544065522ef6fa4a9cf2ef87f0788ed4880198bef29c1a414d34b3
font_02_sfnt_off00011413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11413 16352 bytes
SHA-256: 7242c4b57870e85f8b01f7c507f3b4baf6d1965fef2fc29831cc51ab358e426e