Malicious PDF — malware analysis report

Static analysis result for SHA-256 db96706b197c9694…

MALICIOUS

PDF

85.0 KB Created: 2021-06-26 03:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ddfcadd8e03090e0034346b2d3b6fc79 SHA-1: 75c7c1db0159791e3c910b6bf4da2c34d63985d5 SHA-256: db96706b197c969457082312ecaa091916d394b392f01e95b6b4a605c65dbdf3
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely to lure users into downloading further malicious content or submitting sensitive information. The PDF structure itself does not contain executable scripts, but the embedded URLs are the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://synerhu.ru/uplcv?utm_term=when+should+a+guy+text+after+a+hookup
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/adt13748b1qlvi4n8k9r5nag97/22244803151.pdf
    • https://cakenepal.com/userfiles/file/sozalagevibirepokusoz.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/31404772a5e54e96bde8ae4c1588c469/naderolexobetonusez.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/el56rs8j7g6e54rtc7n01l25lr/sutomewazajovaxebu.pdf
    • http://bright-mineral.com/uploadfile/file/2021062605273225.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ad2d137d54143281c50f127925bee8cb/tetan.pdf
    • http://aarogyamedico.com/userfiles/file/64281944864.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/6ad3596d2135c5025e6104fcccc95bd9/fuguwovevogipikoniwofixus.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/0a810a536c4ef4a253b9e2bee5b26e6c/13190985749.pdf
    • http://career-id.org/ckfinder/userfiles/files/34985577373.pdf
    • https://tsegypt.com/file/mijemimolaketilujofomudux.pdf
    • http://alimentosldm.com/userfiles/file/fadikirogerajuverawo.pdf
    • http://bangdientunhk.com/upload/files/rikizumuvuk.pdf
    • http://2ds-creations.fr/userfiles/file/segaloxibotexipikipedabej.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a48b64a7df---97740519670.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/48112968521.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/n47jb8pqnk2r3o21qlcoit4pg6/kepaf.pdf
    • http://bafiti.com/sklep/userfiles/file/23248683431.pdf
    • https://glycocalyx.nl/userfiles/image/file/21430281073.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607142cdc3da3---xegitika.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160891ba8a0f4a---72723703288.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d08ed784cd2---35556901852.pdf
    • http://aven.su/userfiles/file/voxavo.pdf
    • 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_off0000ea77.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA77 16792 bytes
font_01_sfnt_off00010289.bin
1a626362fc2f6152565633357c1acf514bb5a02a67e8eebfccd8b727e0553af7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10289 16460 bytes
font_02_sfnt_off00012cfb.bin
51cc0054267b2f81d8646cafa59c7e7e7160f0d49772a2401870d26e40965dad
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CFB 11088 bytes