Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb53201f4917e84…

MALICIOUS

PDF

85.9 KB Created: 2021-08-26 00:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d3862856b38aa7dadba9b08383998e77 SHA-1: 855ad54c03080a78c4a755b41a15e76fd204a7fd SHA-256: 0cb53201f4917e8418d62b94bf4709bb98308218d784118484758fa7c7032811
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and numerous links pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content. The presence of a link farm on disposable hosting further indicates a malicious intent to distribute or phish.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076f5b39303d---7632896148.pdf In PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/10d13146950e31abab66c57dad5b75c7/94195644578.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/wilulizujapedutijufe.pdfIn PDF document text
    • http://rrbrentacars.com/files/others/48711839959.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160934d9b87c3f---43982286302.pdfIn PDF document text
    • http://foto-video.ch/userfiles/files/regadixonarofikile.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/73689261968.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608007630c02a---29877453478.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607aca6bea932---fiwuxezafafonuwemaruturo.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/bejusafiwisigejaxu.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/plan4t2c3r959tgg9q6r5cil50/22767020809.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/rivikuwozoworo.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/5b8ea9cb615ee96927067fe1a8490edf/20544869015.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/c84dec5b4230bd978ccdb2416454624e/vigabimilawafixuwawir.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607632822045f---46112261106.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4d366beed---lawitekuxepisabazigebafez.pdfIn PDF document text
    • https://hkfew.org.hk/ckfinder/userfiles/files/2053207715.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/aa02d309e45e34f92d87a9146265999d/kosovifog.pdfIn PDF document text
    • http://bixenony.com/userfiles/files/dagogaguw.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/68783948900.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/70580953132.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/90412357679.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1611c328f27f97---14089061909.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=silly+answers+to+test+questionsPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6B 16976 bytes
SHA-256: 4d4aae709ead6f437ca63502c604904eb26f70cdbff1aca2ab19ec4d9f85ebb6
font_01_sfnt_off000119c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C7 10624 bytes
SHA-256: aa4aebfff50e96a7ff372b4a1c42428bf0a9c84fbc0ecbccb9763c29995dbc9b
font_02_sfnt_off00013245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13245 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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