Malicious PDF — malware analysis report

Static analysis result for SHA-256 35415330dee21c6e…

MALICIOUS

PDF

79.3 KB Created: 2021-09-13 04:36:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 47196b81d6579d7bb25b56f564457208 SHA-1: 1a0197126b9612849471c9549a5f7cfc76983a64 SHA-256: 35415330dee21c6ea95eb93e470ddcf9f68089dcf769ce78b4055e8a81f20c83
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to numerous PDF files hosted on compromised CMS uploads, suggesting a phishing or malware distribution campaign. The document body is heavily obfuscated and unreadable, providing no direct clues to its intent beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://tries.cz/media/images/upload/file/ruferagumigobakoz.pdf In PDF document text
    • http://mkpstroitel.ru/upload/files/madegebimukemiputufewaju.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16139787cdf81f---60550040127.pdfIn PDF document text
    • http://hermandadperdon.es/userfiles/file/pevivopolobadinason.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e96399327d---dotosatofemekebadavuv.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/votunisaxakevakeg.pdfIn PDF document text
    • https://glearningsolutions.com/userfiles/files/xiviwajisibekamo.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133fe98b9883---58044237642.pdfIn PDF document text
    • http://terminsk.by/pics/files/89186125450.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/43566453508.pdfIn PDF document text
    • http://dlabiura.kbo.pl/ckfinder/userfiles/files/kasifo.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/rizamapafomakuzipis.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/denusatilanepob.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae59e4603c---vuvetaxepow.pdfIn PDF document text
    • https://akvanova.ru/sites/default/files/6537463655.pdfIn PDF document text
    • http://intertravel.hu/_user/file/rovigom.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/pixuvolas.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9d2c20ad0---fivexidazavujupaduw.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/161337961b5727---12317408862.pdfIn PDF document text
    • https://veaodaibrahma.com/uploads/image/files/bejake.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/sufevibesega.pdfIn PDF document text
    • https://soswzgierz.pl/web/uploads/files/59741878731.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=war+selection+cheatsPDF 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_off0000d191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD191 10320 bytes
SHA-256: 9d30ce487bb0323553511cc460de4cf1acff4f039082ae07e7003b6a40b82484
font_01_sfnt_off0000e8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000100d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D5 18236 bytes
SHA-256: 47b92488e9f5504d3c0bd1e6eee71dd6447490d2d86f4bc0b8fb342019f252da

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