Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde9e50d48cd6d5c…

MALICIOUS

PDF

90.9 KB Created: 2021-07-27 00:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c147d9f7547468702914e687ab1667c4 SHA-1: ec4ca18fc0683e3a611656fc722721bb61f696ca SHA-256: fde9e50d48cd6d5ccbf98c2a1859746f0bf4890958e690a17c831a8c3dc7b800
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to compromised CMS upload directories and disposable hosting, indicating a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of the URLs and the detection suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb2ed46b9ec---5870784911.pdf In PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/8de583f320955109be88394a7f58312e/74314438043.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/57049089873.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/f8550c3dc8c516b9931f5964895ad35d/37974396447.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/67896383956.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/buranij.pdfIn PDF document text
    • https://sapporopools.com/contents//files/88943844218.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/53628613453.pdfIn PDF document text
    • http://diacritic.org/travel/app/webroot/img/files/zifowalofujajubifozes.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/97939550706.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c031416ca---53470268792.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/11444264891.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/94689691098.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16076dec3baafc---sulig.pdfIn PDF document text
    • http://leilehua76.com/clients/4/4d/4d80c013f15dbe3c797666a457780dca/File/1120383845.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/0ed2ee2cf447ff05ac737e6a0b5c8821/pigiletomuvovameviwipuvop.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1ef1ae761---pulawanodemuxubavo.pdfIn PDF document text
    • http://lmleadmanagement.com/userfiles/files/fakuz.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6c1cf74f8b---vekipofijado.pdfIn PDF document text
    • https://upbilbao.com/ckfinder/userfiles/files/befetopemamodi.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/508e56b4fde30e9d3135c198ec60ff60/sixose.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/3774814069.pdfIn PDF document text
    • https://bloomeng.com/uploads/95151698875.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=que+tienen+en+comun+todas+las+celulas+de+nuestro+cuerpoPDF 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_off0000faf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF7 18284 bytes
SHA-256: 9aed60cb0c9f4971443f059709a4b638bac31f31662b5e659404b730cf0bb59b
font_01_sfnt_off000129b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000141cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141CB 10832 bytes
SHA-256: 931bdcec19fe7891b2d508174080f4c033b6684ac7197d2de0fa128045b1753d

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