Malicious PDF — malware analysis report

Static analysis result for SHA-256 5749e3866a0d58ca…

MALICIOUS

PDF

85.6 KB Created: 2021-06-25 22:53:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a266776df3bb25ca39897473d95d3d59 SHA-1: 2a1943730c982cbd58e2e1f274cb2619154fc1c3 SHA-256: 5749e3866a0d58ca8871836cc7efdea1af84b832533debd1d5014f3758fd6d69
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. The file contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of a link farm and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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 https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/60cddddde159e28e61ed2c5e99a0df2c/pisunevetubasajexasu.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/f2i31flgqj6vm1cr5uo2aimid3/25553372180.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/00m160fr0kfhbplagm26m5n5c7/wukolakazeje.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b90db1aa3f4---96650693468.pdf
    • https://people11people.gr/uploads/File/fonivekarikej.pdf
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/13596380645.pdf
    • http://taxicityplus.ru/userfiles/file/nimutimokaledazenowuza.pdf
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/2991bc6dde28d3bc2d5c048535aae1cb/ragazom.pdf
    • https://kurishupally.org/userfiles/file/farog.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1e42d653f---ronigoduzusibemoriza.pdf
    • https://f27szerviz.hu/upload/files/84619521527.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afdb196bf06---vokasojo.pdf
    • https://saatyapi.com/upload/ckfinder/files/75979238573.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/64fa0a9f0657aba9c2a8dd3b9d58d010/wegelemefogulewe.pdf
    • http://nutronicltd.com/userfiles/file/sivokarekatumadajuzugetuj.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d6f1a2157---sopigaxexaxawa.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/acf154e7903efade4046fe199a8a830b/64434312681.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bf43e3d44---4407906196.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/b97a4e77505358a229d87dff614e183e/98234560386.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/8gbgfsaq5qpgagd8h3jat205l3/rinirujal.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce4ccac0dc---72838242297.pdf
    • https://mimpishiodua.com/contents//files/16966255625.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/5b62017ee681b610f9d5c8e0f88f1f94/16916085165.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=can+landlord+cancel+lease+before+move+in
    • 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_off0000eda5.bin
b08ee121446f0e5ae13cda9a78ad879154c12a56a158db5e310f361ba2ed134b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA5 16580 bytes
font_01_sfnt_off00011868.bin
7ae0579f6a40a738bcf2b7a33ec6a85da2a312a54105eb9847ce374f54d050f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11868 10776 bytes
font_02_sfnt_off00013135.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13135 16792 bytes

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