Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e36e586c259b01…

MALICIOUS

PDF

204.9 KB Created: 2021-07-30 17:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 9ed0d1f15e2e607e458124dec8a61ae8 SHA-1: e89979a1a60c638e8434fe8698c82749d3fdb649 SHA-256: c9e36e586c259b01b866882c8a62954b14d5f6c19882971267c02d92f176e974
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9808

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160a39d36b72d3---mekilomomenonox.pdf In PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3d3dda07b0aa447150d7c5e74f6e9ff5/marejumotat.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/a3grs3ginv3u56ltns5aftecv7/petulovupadol.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/nnint84f3ppb0a4m4bkojuvm51/wuzawolavumemaladilolomem.pdfIn PDF document text
    • https://www.haievent.com/wp-content/plugins/super-forms/uploads/php/files/tprur6g70inqf80ldm4h54geif/gujokemevib.pdfIn PDF document text
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/91347791579.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/3urkg9l7fb0q5cpficg5uqogro/fataxutinegojabokix.pdfIn PDF document text
    • http://teenaramainc.org/clients/875997/File/90741610827.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/soxader.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160b692db4497f---60632243307.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ad1ba5792---9029299602.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c473ad0d0---movovuxaruwasuwosubako.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64753388270.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/d8bc12e5cb6d1eb48694cc1fc6d9aa29/32281319830.pdfIn PDF document text
    • https://rcvizovice.cz/ckfinder/userfiles/files/jedewanovimegujopewed.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/ad2ce2ed5dc9d1505e1437c38f007c91/vusujetonijopikete.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/10441556494.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/73d054691d017c2539b2e35cfb1328f9/59521458937.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5c030b22a---zisoxaropewob.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2fb4ac821a48ed6caf17255c0f7afe25/25404776838.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/vowexilekane.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/318b1ed666e9de10d892e5051e48cc25/fesazotirisufipajigugoze.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210520175238.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f04b0e0edd---52170025655.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/9f57757g8crn2dimjinmrhfq37/gakilugelezobaxokasekaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=format+of+profit+and+loss+account+as+per+schedule+3+of+companies+act+2013PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002c435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C435 11428 bytes
SHA-256: 3def543fa10953d847ef4a0cf835af6464b1595af391a5587a29b026b84089d3
font_01_sfnt_off0002df15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002f727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F727 17572 bytes
SHA-256: 89c59ff4063d5575afec51e07f8402563f4566d410ea9dbb7fe8fec621678e2a

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