Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dea9717145f5c6c…

MALICIOUS

PDF

89.7 KB Created: 2021-07-21 05:22:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3b484b87dbab62f29622d51f7b4ab535 SHA-1: 66eb16c6d5a092ddce1c7517f0a88f6771b3143b SHA-256: 8dea9717145f5c6c412636ae4cdfc498b463aca6816227ffa51f992403d00b40
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised CMS platforms or disposable domains. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests a common tactic of instructing users to open a password-protected archive, likely to bypass gateway scanning, further indicating a malicious intent to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://carrozzeriabosini.net/userfiles/files/ludabadogepiz.pdf In PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160dbf10a936a4---98184125286.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/35edba812db3d136ada30d0721db136b/20606477639.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/34820358920.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/9320jp5fnfd2qlo984rptd42a8/49637949144.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac912bec721---ligamijuwesu.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210617152257.pdfIn PDF document text
    • http://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/sixiradur.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/7be1e25f5e3201c39e9a8c8b516f7875/70072091201.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/42434027910.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070869f6660a---15995956166.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb632cf938---mazuxi.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/41b975595624cbe66960521ec207a9bf/64327537925.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/79963940021.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8690f29363---4323308110.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aebb9728edb---lusen.pdfIn PDF document text
    • http://myblindz.com/fck_user_files/file/dosufuweduforigabugel.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/vivafarafupexite.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/womatijebudi.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/48744335376.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160759d916e73c---lowubosona.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/73915374112.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/28234054595.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/pimozezojibufabi.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/vmv0lp91r61d6d28qs50gk3c2l/nanedomuxonogiza.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1609e88583fbc1---68625530327.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/76767524536.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=chromatography+for+kidsPDF 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_off0000faac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAC 10900 bytes
SHA-256: ccee473ef8d2294a312ed836462c492db099f44eb30d75dea159383368c8646c
font_01_sfnt_off000113cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDF 17412 bytes
SHA-256: a8737b5c0a33fb13111fb01b8635950e7fe734e9723f89fcaabc522524ed83e7

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