Malicious PDF — malware analysis report

Static analysis result for SHA-256 347e7b79ae696c1e…

MALICIOUS

PDF

91.3 KB Created: 2021-08-03 03:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 335a1b825b4e4f25ba5f1701a8c5379e SHA-1: 8268f7ebdf9c32776522381c540b23ae7a3d6052 SHA-256: 347e7b79ae696c1eeb63f693a95e260ce6420360b653718a4442286fa008a374
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress uploads and disposable hosting. These links likely lead to phishing pages or malware downloads, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b4885a2d73c---61466614396.pdf In PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6ae90846e---24004929735.pdfIn PDF document text
    • http://www.propper-droppers.nl/files/file/vuwisotopijed.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/olh4n5bgqqjdtvia6fsq2bjhd4/39917888721.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6b39bd0c5---91934994779.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c55bdda5534---4094531557.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/87279805291.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/f8a0818ef61d8587e3c5544f84c2ff67/solilidudanubilogaxa.pdfIn PDF document text
    • http://www.astmalek.cz/obrazky/file/88660675810.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/46829855732.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102e9774b953---23657271810.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/cdb9266959d84df3d8565ebc27d951d0/zabojowinadapizirozulef.pdfIn PDF document text
    • http://thedreaminitiative.org/Content/Admin/uploads/files/24526835577.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/15964866928.pdfIn PDF document text
    • https://ranagro.com/files/50725252909.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/73880006882.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/2343898008.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f14c20e52.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/xofofigirejivuvesure.pdfIn PDF document text
    • https://sealskinz.ru/files/file/11622112364.pdfIn PDF document text
    • https://eventaipei.com/upload/files/gomexibazuvufup.pdfIn PDF document text
    • http://www.grupoaccs.net/ckfinder/userfiles/files/miwinabazatoroxafog.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/fe5fabde75327dddeb21914235dda6e5/kusavudidatogegoge.pdfIn PDF document text
    • http://thaimassageboy.com/ckfinder/userfiles/files/67620002615.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b14629bb8d4---fibojinobimuwovovuvuju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=shred+fat+and+build+muscle+dietPDF 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_off0000fe4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001165d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165D 17328 bytes
SHA-256: 6c950c9887d0fb66690db4ef08bd9d156490c6c508b66f4bd136a56d2e35555c
font_02_sfnt_off000143a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143A7 10936 bytes
SHA-256: 89eb78b36e07d81927763bc22df38eb2e5aa70d9f27d9a0e685067e884230908

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