Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4aafe01699217f6…

MALICIOUS

PDF

86.0 KB Created: 2021-07-17 17:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 924c7cab98de2ebf9747f3b006b6067d SHA-1: 7a2293b671029163833708df328ca4b33e2a396b SHA-256: c4aafe01699217f6e5a299ba98c8c8cc99e93568723d8845ee14ae65a45fd8d8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to compromised WordPress upload storage, suggesting it's designed to host and distribute malicious files. The presence of urgency language in the document body, though not fully readable due to truncation, further supports a phishing or social engineering attack pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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
  • 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://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092930bca46c---pejalugudikexomepewum.pdf In PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47e4cc13c0---95081734595.pdfIn PDF document text
    • http://klinikoral.com/img/userfiles/files/97951718397.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/32221861489.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/058c4ac430c71c6b98ea9e3138607a8f/lomaxujurid.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed753a8a7a---5524271549.pdfIn PDF document text
    • https://vaitinhdien.com/app/webroot/upload/files/67764733283.pdfIn PDF document text
    • http://billsky.ee/files/file/41715160794.pdfIn PDF document text
    • http://mav-auto.ru/images/file/837991910.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/ae7q2f09vuthddklkhtjqkr6hk/30595451978.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4ba4962d1---jesewavilasedowagafeliwi.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/39951598876.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/24264640810.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/9b09d2d88d6659506cf7878facb7b785/liget.pdfIn PDF document text
    • http://18554080.com/userfiles/file/49190612848.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716390e3f71---bokuzogirerusi.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/27e6f8efcd24c5c3664829c3cf51721d/zafezuxigozukujas.pdfIn PDF document text
    • http://bracyfamilyreunion.com/clients/c/c2/c2db1a97f769835965582c74015c7782/File/faxibanupobemamowipenuja.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/26667ecef27b13bd7d79823b7622fd79/1931280909.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/sanonexeg.pdfIn PDF document text
    • http://slhs1958.com/clients/18590/File/zowevugogigaw.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/42dee7ffd91478b07e4c95d9e1198ff7/34285041922.pdfIn PDF document text
    • http://strandedtattoo.net/file/37422608765.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/15742687245.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606eae764a357---63593346718.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/32037345080.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/faragisikilu.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/vojizonuloluzire.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=q+fever+in+dogsPDF 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_off0000eefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFA 10348 bytes
SHA-256: 58ec4feb2651580ed58b44184b12a62f6ba3b30246b6d9a0b4b5869b7732ac24
font_01_sfnt_off00010652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10652 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E64 16884 bytes
SHA-256: ed18fb7b9ca75b4f05d5fff70581d3b1c196557b9bf1f5f22ed1aab7fda4fa34

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