Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec995f33219fa68…

MALICIOUS

PDF

102.0 KB Created: 2021-07-02 13:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 80c42de0729852283ef408459141f175 SHA-1: 2d06bc6a738f809e81695c4c66e69098e2cafb53 SHA-256: 9ec995f33219fa6867b36a7811b5d8870bafddd9268afb9582398a4934c3148f
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress upload storage, suggesting it's used to distribute further malicious content. The presence of a 'download button' lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9708

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.
  • 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 https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bced44486bf---momupa.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16083feb1776b4---86694359339.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/9s8ad4u5dp9v2iekocfpgo38f7/69513209557.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acfc8486e29---dudurojodim.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ccae8c091---22729478006.pdf
    • https://beautyyaurient.com/editor_upload/file/zetijazuradoxu.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e3e18add5---67662870935.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b09ac6486c1---62700705479.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743fd9277dd---rafejobifekivunarib.pdf
    • http://qca.ch/userfiles/file/23387000035.pdf
    • https://parklanehotel.asia/userfiles/file/83821135518.pdf
    • http://charivne.info/images/file/kemavabilupexase.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b83ea53f9---4286695587.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cab36cc4f---xotokazirizipuv.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/03a48f789b7614e62c2edac508a345ca/85411827629.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1eb022880---48887503876.pdf
    • http://www.adarshvidhyasankul.org/userfilesfile/molimuzubibuxomidopi.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/4369c96b51343f5e714fd966bf5d6651/gejukosajobub.pdf
    • https://contact-house.com/fckeditor/upload/file/65202631309.pdf
    • https://toromecanicorodeo.com/files/16230360783.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/nfdpbc5es6qqap0fnn3q6jv4mh/45912860359.pdf
    • http://paitoonbox.com/userfiles/files/ponugufekewadud.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16072198e82318---jasokenupibag.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/142ce2d1b9d4d1313fd8b724beb8a68a/2451407080.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a4b54f10e---kogijojovus.pdf
    • http://nuitsdartistes.eu/images/file/66469681904.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=anime+cloud+apk+android
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00012852.bin
8c4751f8b16fff4198ff12f0eac8f2375f6d8dc334cf8140afaf682b8944d2b8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12852 27132 bytes
font_00_sfnt_off0000f7e3.bin
ce6d9d73832488c6653fa4c6fd1029195e570e2966d6ba02be7f2f986d2253bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E3 18804 bytes
font_02_sfnt_off00015846.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15846 16792 bytes
font_03_sfnt_off0001705d.bin
7fec8f366f226a9477917a10000cdbbd7947e2923016a1abd63ceaf5caa8b07d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1705D 10584 bytes

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