Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f2e912c1d852e99…

MALICIOUS

PDF

94.8 KB Created: 2021-10-18 00:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d87ab850f859e5c7eafb973a295209b8 SHA-1: f0292e09b5ced8d98f3f59ac7679a8b2e3bfd38f SHA-256: 2f2e912c1d852e99e499c1911679bde81d6e218470746d4acccf9c697975004b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous URLs, many of which point to compromised WordPress uploads or disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://parfumerieindex.nl/images/uploads/lumurozedefipeganovoba.pdf In PDF document text
    • http://domingo.hu/ckfinder/userfiles/files/ganabafezuxugijuroxowe.pdfIn PDF document text
    • http://sungwoo-n.com/userfiles/file/3240212895.pdfIn PDF document text
    • https://ocw.tw/uploads/files/gugigufuwejozodaxowan.pdfIn PDF document text
    • https://jasmijnbloemengroen.nl/userfiles/file/xefezimufebiziduveluj.pdfIn PDF document text
    • http://xn--sanitrprofi-p8a.ch/fckeditor/editor/images/file/72092185303.pdfIn PDF document text
    • https://svetplus.com/userfiles/files/tilatoba.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/xopoverafezu.pdfIn PDF document text
    • http://videlec.be/ressource/file/falobinafidasomap.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/90818637678.pdfIn PDF document text
    • http://tantos.jp/js/upload/files/zobupap.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/3s10afkoquplg71f2fl3o5m9k0/78856672905.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/29764041464.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/goxugusizuvagesajunev.pdfIn PDF document text
    • http://vtaky.sk/media/file/piresi.pdfIn PDF document text
    • http://www.wiz-fac.com/uploadImg/file/31837602637.pdfIn PDF document text
    • http://print-printonline.com/ckfinder/userfiles/files/1692617101.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/f99b3e5952498b432f5291360c9a74a2/50757100835.pdfIn PDF document text
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/boludikuporenoxig.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1613067ea9dabd---93716971468.pdfIn PDF document text
    • http://blueview.nl/app/webroot/files/userfiles/files/41789843803.pdfIn PDF document text
    • http://studiolegaletrotta.eu/userfiles/files/burizolo.pdfIn PDF document text
    • https://merohamro.com/ckfinder/userfiles/files/7881677758.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/BcFPVxLj4jw/uplcv?utm_term=sed+replace+newline+with+spacePDF link annotation
    • http://zs.tom.ru/jsplugins/ckfinder/userfiles/files/32029244883.pdfIn PDF document text
    • 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_off000101ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BA 22616 bytes
SHA-256: 1b80437d663adc64165daad4dfd5c31388ce39b83099e87c9ea294b7d51bc853
font_01_sfnt_off00013ced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CED 10652 bytes
SHA-256: 188c2920783c6c823e8cf2904cce0b9dee8ce71164100098a9ecf25ba767753a
font_02_sfnt_off00015542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15542 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1