Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd6212ea9427608…

MALICIOUS

PDF

84.8 KB Created: 2021-06-26 02:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 07dadb2844b186ad2aacde2c211d2498 SHA-1: f0c3c0adea3b646d45a392180c17bc3668d871a2 SHA-256: fcd6212ea9427608254c28ae476d1f069185edb5f9119fa9f941762d8953d82a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://ylgems.com/file_media/file_image/file/7987881356.pdf
    • http://stonebreaker.at/kurogakulapavepuwep.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c89b726da9---21883596389.pdf
    • http://salon-urody-bellis.pl/images/file/sogurofarid.pdf
    • http://nousgarage.com/userfiles/file/95695944086.pdf
    • http://ruilong-ironwork.com/CKEdit/upload/files/52999240249.pdf
    • https://beautydiction.com/ckfinder/userfiles/files/48778810027.pdf
    • http://bonfiremadigan.com/uploads/fckeditor/file/45728614958.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/bda99a8432b6141aca8f64bf441b40da/81087046302.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/e07377341996a399fec5a7f6bcc7b1cc/zexopurabisuwotidovojiri.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/a7c88e1481cec6c45209c317acbc2436/dijajivelut.pdf
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/04aff264d813e0af0541b586de63e3f2/toxavefizunotolevalolafo.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875ad382027---fijirowuzem.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/d386828681cd86a5d977c06ed57c934b/27994334251.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/f89b029cc5ccbc6e6c45071aa816e545/78379882825.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f66185814e---91169181288.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/i9ts7eber8h8s1e0mi0fo7rpeh/waxusa.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/j5ipsbj3rtsoa0cnkk633ojmi1/33333048915.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb207fd4ff9---64801117395.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/8ef4e1ea95ff99c48f1257064a391013/51380405532.pdf
    • https://fanaf.com/article_ressources/file/kejubulazokubudox.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0575d57367---10714299266.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8479a94cd---lerixato.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/an7gk6gcq7bicog2o7tcsd86sh/vagakadijewopes.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b65aba67b---49419011754.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c90459f1983---vejapuv.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=165+centimeters+to+feet
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e86c.bin
6713ff8e83aa86522bc255e56f3fe71b1cc4aade5068c442ca00a6702016fb83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE86C 10544 bytes
font_01_sfnt_off00010089.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10089 16792 bytes
font_02_sfnt_off0001189b.bin
2a91aa5a576a643f158ebf14a22b3cff355b830a29119a316723e5690815e173		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1189B 17324 bytes

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