Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2aee9da6e8a8140…

MALICIOUS

PDF

84.9 KB Created: 2021-09-23 20:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: eff635d4b28c83bf7b2e04826b9048dd SHA-1: edc217ba01b0b961739fc6704482e7d4d96985b7 SHA-256: e2aee9da6e8a8140320cb4e42862d5befc66e4d4c901b95411b112f608931d26
184 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to compromised WordPress upload storage and disposable hosting, designed to trick users into downloading further malicious content. The presence of a 'download button' lure and callback phishing elements further support a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 http://iaestedresden.de/userfiles/file/60890683314.pdf In PDF document text
    • http://ingmarcofaedi.com/userfiles/files/1884321728.pdfIn PDF document text
    • https://ispartaprefabrik.com/ckfinder/upload/files/25071306368.pdfIn PDF document text
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/xizatenugu.pdfIn PDF document text
    • https://e-room.co/userfiles/file/supogafegitiroloxusuxe.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161419adb30471---42235423175.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/tosokulokegevujivegubibas.pdfIn PDF document text
    • http://xn--b1adrijbbb.xn--p1ai/upload_picture/wobimiwizezafewufomaz.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614b0b7ba205f---46552824056.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134e05cb8a3b---34138432041.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a252750d0a---goduvagavoxikup.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/45825650387.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/nigopovulogew.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161483e3154cfc---jilikedeje.pdfIn PDF document text
    • https://bellcera.60km.com/upload/files/31704459203.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/64989081415.pdfIn PDF document text
    • http://fxmeat.com/upload/file/3ea1f914a122d7d03aefe6bbf4c896e5.pdfIn PDF document text
    • http://american-security-inc.com/assets/ckfinder/userfiles/files/28560720764.pdfIn PDF document text
    • https://printsolutions.ro/uploads/wysiwyg/files/34187290218.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16146fd60dd793---71436008415.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/13418724881.pdfIn PDF document text
    • http://essentielles-theater.de/UserFiles/File/32030629623.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/50292285169.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/derosodirojibij.pdfIn PDF document text
    • https://www.singaporemedicalclinic.com/ckfinder/userfiles/files/42055067159.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=just+dance+apk+downloadPDF 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_off0000e47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47F 10584 bytes
SHA-256: 04b9a137973b917e78a94ff0ac1108254a3714c7e003c448bb142272dfedd884
font_01_sfnt_off0000fcf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11508 18716 bytes
SHA-256: 67d54631d2e5bb590fc679b5a930d0461b1f6c2a6848fb329f874e244802d96b