Malicious PDF — malware analysis report

Static analysis result for SHA-256 00803f14efdfcf0a…

MALICIOUS

PDF

106.7 KB Created: 2021-06-29 09:34:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c27d852e3d3578abfedbe26911cd1762 SHA-1: 0622438303766ccaf9c8b49a33b6c89742ec7dab SHA-256: 00803f14efdfcf0aef9e519a2b2fdd2c6390053188869caefd754d9b71602f73
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware hosting sites. The embedded JavaScript is likely responsible for initiating these redirects or further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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 https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b77453d1ceb---97010154341.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea871d1fd5---jifesirelajukewumateri.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7ee74e62d2---rekatozinoxugexomeju.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/5949681767e9cad153c668b6258e1d58/71122672564.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/dbf301e3bcdff027cab36288cc41904c/jixujufarapobatebe.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/bfec1d573954b0ccb55044a08c12f89f/gusodop.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/46e446a4f4d2ef208a1a27c11099456a/88022180762.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/ak0a9osgsdtt4bt77413h87ndc/xidozapisuxijomokejapo.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/6adb9ef3eed4a02c6c77c315f13f6191/65049163437.pdf
    • http://www.cafeinca.com/img/public/contenido/file/veweravinusuli.pdf
    • https://newchat.xyz/js/ckfinder/userfiles/files/33703513175.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c2aaa748da9---dezuzujazugim.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4321bd84b---jenowoleniruviveben.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/oev4621omadtf6tq5ain2hnkdo/zolesebifodaxuxifufu.pdf
    • http://beerskiboot.com/img/upload/file/pupeda.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/2fce142d996c1fa968e0e3c4eb038981/24482043470.pdf
    • https://euroroma-bg.org/files/file/tavexedepep.pdf
    • https://juniorclublivorno.com/sitonews/images_upload/files/xinon.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/54ffa2d7b7792e25ead6845949fec270/38146168661.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/af8b6cb260a469d24c468942e64b9c4f/zimedarunoxuri.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16090d94c893bc---79279344304.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c32fb76af---bubutalomilon.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/4ad1de59db3103f39ef98c88089a401e/pewinilipijalo.pdf
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/8462125a9cdac5c650b97cf42c972eab/nevunematavidopu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=cohesive+devices+in+discourse+analysis
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://doi.org/10.36456/jet.v6.n01.2021.2963
    • 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_off00013835.bin
197b276ef2ae31a54363d0e91f2b76aca0d107178d59762a0f535bf79a7bfe24
pdf-font-stream PDF embedded font (sfnt) at offset 0x13835 10680 bytes
font_01_sfnt_off000150ac.bin
195256c14f842e05f5a72bf65731e6f045392421a154f521961bea4770af4eda
pdf-font-stream PDF embedded font (sfnt) at offset 0x150AC 21528 bytes
font_02_sfnt_off00018383.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18383 16792 bytes