Malicious PDF — malware analysis report

Static analysis result for SHA-256 aab0f100bb7a30e5…

MALICIOUS

PDF

84.8 KB Created: 2021-09-02 12:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7263fb689caa047c4d2acd88400b76a9 SHA-1: b5f2f705d189a15d3d35391b9023510c07228be8 SHA-256: aab0f100bb7a30e57acec3d28d9b618ad91c87d33424ebea5ca8bebdfec83aef
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features a link farm pointing to compromised WordPress uploads, suggesting an attempt to host or distribute malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' further supports a malicious classification, likely involving phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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.
  • 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 http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869806152f8---gelagenawikegoxupaxo.pdf In PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210709_C35B7A9A5DAAA63F.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/qe51hfq7ulhaqm72kcl0es47ch/rinubejetowezipadube.pdfIn PDF document text
    • https://ksboutlet.com/file/files/rowoxixojuragu.pdfIn PDF document text
    • http://nanchang.chinatupai.com/web/js/ckfinder/userfiles/files/jofikerubisapixopugi.pdfIn PDF document text
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/d3164a0c71008712798f4397fef6a8ef/32820220034.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c569af47f3b---92934513293.pdfIn PDF document text
    • http://alpinedelhi.com/userfiles/files/dukowejijibiroxok.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/mutiremexupebej.pdfIn PDF document text
    • https://onlinendttraining.net/files/vuvurivakavo.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e33dad49179---79232471287.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/gozivigopolajagekomo.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/74888651474.pdfIn PDF document text
    • https://lacausedeslivres.com/userfiles/file/zadugu.pdfIn PDF document text
    • http://gpp300.fr/userfiles/file/92304742694.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9d57dc785---xipunekurex.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/vuwomejotakazuwemigana.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/weragara.pdfIn PDF document text
    • https://sproname.com/files/userfiles/files/lonuredeliferibipugunur.pdfIn PDF document text
    • http://eshop-kocicinadeje.cz/files/file/dukezudizufeditedewo.pdfIn PDF document text
    • http://hongsung114.com/files/fckeditor/file/96791707691.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/541j445hvc9d48drh7nn10pmqk/56053153690.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/73614159753.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/9232792f869006736278a5e0fa98d286/vewopabumatisoma.pdfIn PDF document text
    • http://com123.vn/uploads/file/nemisepigigo.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/dojidofexux.pdfIn PDF document text
    • http://sswjeans.com/files/95202441930.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16093fc6eda9ae---98917694158.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=rcia+study+edition+pdfPDF 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_off0000e3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EC 18704 bytes
SHA-256: 1d6da96d91f818567e83ed93065c98ee73bb1815f58c8f1caa7802174977a3a7
font_01_sfnt_off000114b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD0 10728 bytes
SHA-256: bea359a769bfd7342a61bb5778962ce95f28d3ef7352d936fa6ae1d9d7e8e9d6