Malicious PDF — malware analysis report

Static analysis result for SHA-256 79a74319019eacfb…

MALICIOUS

PDF

78.8 KB Created: 2021-08-05 00:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9e89d094816f7d953fc0ba13e2b75e30 SHA-1: 779a57352ff3e6aa83660ae5aed437dcc0e2c1ba SHA-256: 79a74319019eacfbc6db7b9044126e5d5929d21c5704ac12e30f03120e17c962
172 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious files. The presence of a 'download button' lure and urgency language further supports the phishing pretext. ClamAV detection and ML classification confirm the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 8

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://chcial.ru/uplcv?utm_term=pacific+rim+2+full+movie+in+telugu+free+download+hd+720p PDF link annotation
    • http://phanbonvbm.com/upload/files/duxutapibevabibokime.pdfIn PDF document text
    • http://tinnaduraflex.com/uploads/files/zuzakuxowud.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160923114da857---kinogevopopabojizifuva.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/rosexamupiwoduliz.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160af89d196185---vifixere.pdfIn PDF document text
    • http://come2menorca.com/images/file/58812385516.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/64257070266.pdfIn PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/67823679470.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608238285ccff---gaxemaledum.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/zuxuzuginerubuvozepiwun.pdfIn PDF document text
    • http://bitree.net/ckfinder/userfiles/files/lerenisevaxuzomasufewam.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/ba90368c0ba1a7960784cc04877e356c/87165875009.pdfIn PDF document text
    • http://kasargod.net/uploads/file/gixedolawugej.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/077pk92jull5pj0mt76ra29oq4/rorolezikuwedirezu.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/zumovomemekekeboze.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8071917a0---xutarebav.pdfIn PDF document text
    • http://xlpe.net/Images_upload/files/mupisovasedelaribejesi.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/1e03f92592f389a7231edf4323237f96/91897443677.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/9ecdbe1e501aba4fdb2edd98c1279ed8/worigiwijaxisodolunux.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/lemosutasedariziwevi.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716fefa27f2---fikutewubawogebonulovup.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160eccb69ec65e---24787198769.pdfIn PDF document text
    • 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_off0000cd63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE575 16848 bytes
SHA-256: 5eab7cbbd631f05b1fc17d9c1d772131e139e0b77449b0e9d8ab6d3e0c5783a0
font_02_sfnt_off00011191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11191 11444 bytes
SHA-256: 51efeb153728da7f4242b09acc9ff512ea824339befc17ccb4644494a1ed3c8c

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