Malicious PDF — malware analysis report

Static analysis result for SHA-256 cedae27ca4946bc4…

MALICIOUS

PDF

94.7 KB Created: 2021-06-27 12:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 86f997a5a281e53af4dc86ad4481cb22 SHA-1: fd0cec8f689e82ef0884ea377bba18c85802f669 SHA-256: cedae27ca4946bc44d2ab1480388ee7469012a957009b9d9362af90b88782c5a
176 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate a malformed exploit stream and a link farm pointing to compromised CMS uploads and disposable hosting. The document body is unreadable, but the presence of numerous external URIs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://joewhitefamilysite.com/clients/59967/File/lurodekitovunenele.pdf In PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/0b98507b244e83cb13b8a96d14c58e0f/vilasofa.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/38b1a1020e39a928c61b3647e5b64004/jesevonusel.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/ramoxonojozapafexinanoku.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c01149ba37d---dujupimorodazebisof.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/81207171088.pdfIn PDF document text
    • https://aviseco.ro/userfiles/file/4934839561.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16085d5af4c024---mufigu.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/23058252541.pdfIn PDF document text
    • https://itexpertdog.com/upload/files/wuloluvivanurum.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/perinejizosab.pdfIn PDF document text
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/14917799473.pdfIn PDF document text
    • http://charivne.info/images/file/maraso.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cae2532acc---89297723230.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a862372ba44---pelupiwalonokifepujanef.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/45087487050.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/cf3aea0f208cfa80a2417243588ed0f8/mifarekuvusiniweguxifu.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/eglt8j8oj5no7sosh0mah7n643/41595425868.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec3a88a4b1---dusizadig.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/8fbemoths7u9ia98c79e3351r1/43752617650.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/c21c54c1569ebff9c9d2e28368014e83/vuredejujutazunupalepe.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b998d47bbea---70506434007.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=united+hypermarket+offersPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/ccb9d574f52dc7ee5bf3d2789283ffef/51099996375.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF029 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001083b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083B 17424 bytes
SHA-256: af7fc6824add33a01e58b830a3e5f30d22bdfdc507f85d7daeb6e3ee573c0e5b
font_02_sfnt_off000135ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135CA 10932 bytes
SHA-256: 72c72d6ecd7e2fd678cbc892a1c11ffd2bdfc9d4e3c5dc4f34ff1410400b2df6
font_03_sfnt_off00014eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EEE 18692 bytes
SHA-256: caf6da81d95dcc55a52fffbaec635fdcd70839282fac193b16eaff8eb5ed3f36

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