Malicious PDF — malware analysis report

Static analysis result for SHA-256 339e2695ab17c345…

MALICIOUS

PDF

81.4 KB Created: 2021-08-31 16:30:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0863aae41308d5ebd2f816cb62583099 SHA-1: 533b24a0e4fafda96dd8db9c0d98f173ee74cf79 SHA-256: 339e2695ab17c3453ba09307d8c98bca7f592167f5e1ae814b024aac1111af8e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to multiple compromised websites and disposable hosting domains. These links likely serve to distribute further malicious content or phish for user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://csodamalom.hu/files/files/pigajubegekiwabaxeguzaxev.pdf In PDF document text
    • http://azizavacanze.com/userfiles/files/46792902810.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/36497816940.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/67510444160.pdfIn PDF document text
    • https://dermatologie-chamonix.com/userfiles/file/85248945966.pdfIn PDF document text
    • http://kasargod.net/uploads/file/3822810693.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/69e137764ee552a42b0d0b96249753d2/66760121942.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/jojerikaf.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/29c47c7fcff5ae7972d7baa67931ca41/56058152514.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/46097073885.pdfIn PDF document text
    • http://pettwayfamilyreunion.com/clients/39389/File/zegewebujefenonurunij.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/4917249210.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/fenufaf.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/nekizoramoso.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a8dbbe91b69---33649114578.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/falimexasuven.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/wevajidarupudepurosoruse.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608afcbfb2918---31470000160.pdfIn PDF document text
    • http://gfzgt.ch/upload/file/32483734446.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/davarup.pdfIn PDF document text
    • https://www.aeap.com.br/ckfinder/userfiles/files/puniselokudetuderinuke.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/79194112642.pdfIn PDF document text
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/22227060398.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b72c09b9477---73313648146.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a03ad0e8d70---80379344290.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=two+dimensional+histogramPDF 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_off0000d980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD980 10744 bytes
SHA-256: 3ef62116569e079b4a7c82980c8a0b7c207ae402d6485b563fb0125d454af989
font_01_sfnt_off0000f1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E9 17780 bytes
SHA-256: e26d0d9ff3d37663365dea0c567f7cf9675c3b3997eb00a18903fac07d432001

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