Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dee564e62229fb6…

MALICIOUS

PDF

63.6 KB Created: 2021-09-22 16:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7b878a7787f9eb68c3ea3ffc6e0027ad SHA-1: af041173715d0c50b4b7feb1e10937695dd5544e SHA-256: 8dee564e62229fb687cb1d8a8a5df8a1c298fa484c9fcff2dc7bb0e6fac38947
154 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 ML classifiers indicated maliciousness. Heuristics identified it as a link farm, with many embedded URLs pointing to disposable or potentially compromised domains. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its malicious intent. The primary function appears to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6359

Heuristics 5

  • 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
  • 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://heyumpnd.com/userfiles/file///26158832698.pdf In PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/161387d8ccce90---97289238946.pdfIn PDF document text
    • https://zaragozadenoche.es/upload/files/59747145470.pdfIn PDF document text
    • http://vindindex.nl/images/uploads/teripabe.pdfIn PDF document text
    • https://mimpidia2.com/contents/files/ketomozijon.pdfIn PDF document text
    • https://excore.hu/ckfinder/userfiles/files/35778899396.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16132b146d7f16---zokomozatejonivikevakizo.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/70663312766.pdfIn PDF document text
    • http://ccshecea.org/upload/files/bozilofojaruta.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/n9ipohrqs1es36i4s8739jtv0e/85347757745.pdfIn PDF document text
    • http://24cvety.ru/upload/files/61880484006.pdfIn PDF document text
    • http://ecme.site/2015/vat/upload/files/pemaletigumag.pdfIn PDF document text
    • https://duongthuy.net/userfiles/file/93659547015.pdfIn PDF document text
    • http://greensketch.in/userfiles/file/31307444101.pdfIn PDF document text
    • http://warwick-ems.org/userfiles/file/17091249990.pdfIn PDF document text
    • http://sh-ruiyangcpa.com/userfiles/file/2021-9///20219111653183201.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141140c57bf0---bufefibikokomoxif.pdfIn PDF document text
    • https://gad-elhak.com/userfiles/file/gevipalenizegegajivape.pdfIn PDF document text
    • https://aecvfcom.nrgence.com/upload/userfiles/files/59270921225.pdfIn PDF document text
    • https://kmkmekanik.com/upload/ckfinder/files/53620736968.pdfIn PDF document text
    • http://bociany.sk/media/file/kurax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=digimon+world+3+for+androidPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA2D 10556 bytes
SHA-256: 0ab7d69b3480ad96931e12f3c06b999e5964c2ebc848803f5218392b7bca11a3
font_01_sfnt_off0000d202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD202 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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