Malicious PDF — malware analysis report

Static analysis result for SHA-256 c037ee5815afba4a…

MALICIOUS

PDF

68.6 KB Created: 2021-09-02 07:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: deea4bd8b069e98f5fd4dca7ff257cfb SHA-1: 4b3da8767fe47861448ae903ba90513bd9eda63d SHA-256: c037ee5815afba4a5b21d544fcb65bc9164c36e63a929fa8541d02c288a28001
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The 'PDF_IMAGE_LURE' heuristic indicates it uses an image to hide clickable actions, likely directing users to one of the numerous embedded URLs. These URLs often point to compromised CMS uploads or disposable hosting, suggesting an attempt to distribute further malicious content or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://alltimescare.com/attachment/files/75627581646.pdf In PDF document text
    • http://commandhousecreations.com/uploads/files/dukifarigilutaxibimemi.pdfIn PDF document text
    • http://rowadhr.com/app/webroot/upload/files/61189734750.pdfIn PDF document text
    • https://chaplains-camps.org/upload_picture/file/56889998157.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788b5bc600a---41000169090.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/5292ee65e9e5732606109624f979ef32/63149385628.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/zatolabunuli.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/welunepajosej.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080baf6a22af---dosudemoj.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609bdecc5dfcc---zogiwubotofapilaje.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/5c25ba327167d63f2fdaceb3958e3be7/nowuwomabatafezepegewu.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a40bac069---54279364137.pdfIn PDF document text
    • http://deasreunion.com/clients/860224/File/45438426090.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf999e844f---tasofokobuniweguv.pdfIn PDF document text
    • http://capableapp.com/uploads/files/98447548523.pdfIn PDF document text
    • http://www.sintsprev-ms.org.br/ckfinder/userfiles/files/goborof.pdfIn PDF document text
    • https://cncunse.com/d/files/77488505723.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/jadibuviso.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/pujewuromigotuzezix.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16077fd8e9b407---11676020443.pdfIn PDF document text
    • http://jar-ted.pl/file/2831479025.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ffb40343e---javuwagup.pdfIn PDF document text
    • https://geniodelweb.com/file/vuzewo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=least+common+multiple+of+12+and+5PDF 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_off0000b05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB05F 11044 bytes
SHA-256: ceb1b33abdae03378219dd0e072a88096d202cbc65525334551d19caf4462c25
font_01_sfnt_off0000ca24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA24 14212 bytes
SHA-256: ee9c3f37c902ce50f1c11185c9b548c8a80e3c4ce2e085eb5f183183cf6111b8
font_02_sfnt_off0000ed12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1