Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2263e5c5799c688…

MALICIOUS

PDF

93.4 KB Created: 2021-08-20 06:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 4f1193418a733c3b13b53349ea400341 SHA-1: 1804398f5357f3675404863a9de9153d98fa2156 SHA-256: b2263e5c5799c688d053642a5ed6cbc6d17766ede9b50015b52b7b8a5fa77cb6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The presence of numerous unknown URLs, many hosted on WordPress installations, suggests an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/nbjtidigms541jn06jaabog5s0/19570860080.pdf In PDF document text
    • http://asfalon.com/__files/file/visefibatejozuvasananu.pdfIn PDF document text
    • http://buildinggodskingdom.com/webcms/file/veriguguruvusekef.pdfIn PDF document text
    • https://petala.gr/userfiles/file/86967760337.pdfIn PDF document text
    • http://rhondachem.com/d/files/33726466412.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef98bc3a5f---1622286452.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16078c7fa4cf69---44712106144.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/rupilisutivezizo.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/folodokegexigibubo.pdfIn PDF document text
    • https://fond.ru/userfiles/file/80593328566.pdfIn PDF document text
    • http://peak-experience-europe.com/images/blog//file/pebapanevimifitemu.pdfIn PDF document text
    • http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41913533539.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/7b8a41f5eac456183ea84d0c72a93acc/fidejikemamizevowamojuk.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5acfbab9e---sifepanijewipesuvejo.pdfIn PDF document text
    • http://cansuyu.org/resimler/files/sivutawexotomukuwezokuli.pdfIn PDF document text
    • http://montex.pro/uploads/userfiles/file/87271717966.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608058eacad99---wimoxasinepedebolu.pdfIn PDF document text
    • https://automatisme-portail-bordazzi.fr/fichiers/tikefakanebuk.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/q8jok1dmhib848k0ipl02qe5ip/22275262704.pdfIn PDF document text
    • https://aromamarketing.md/img/files/54577354848.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/zugepokakitu.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/ec0daa52d1440de65e0fecbde879e797/51569706315.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/b7bd48370b1afe92acd9d9adee685c05/86412193512.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/94365021461.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ecfaa3596---30118418171.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=minecraft+bedrock+hack+client+2020PDF 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_off0001069f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069F 17980 bytes
SHA-256: ed3543b5d6ede2bf5273732d35e62a6e43b3858de6605b0e350b08a073e8017f
font_01_sfnt_off000135bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135BF 10872 bytes
SHA-256: 037b01cd76a991050e0bfdea4cef159d2c1c9bcf3f1fb9f415b98790f80eec81
font_02_sfnt_off00014ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1