Malicious PDF — malware analysis report

Static analysis result for SHA-256 2efea33595f62faf…

MALICIOUS

PDF

69.6 KB Created: 2021-09-24 16:13:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 05cbacbfc93c35f6954ed6f84ac83eb1 SHA-1: 167fcdb3bceea74c71627651a0016d279cd47104 SHA-256: 2efea33595f62faf273a4ac5c0982d186ca056e34279cb33679904a42d819f06
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier. It functions as a phishing lure, presenting itself as an image-only document to entice users to click on embedded links. The document contains numerous URLs pointing to potentially compromised websites and disposable hosting, suggesting an attempt to distribute malicious content or redirect users to phishing sites. No scripts were extracted, but the overall structure and URL patterns are indicative of a common phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 69 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 https://cructi.ru/uplcv?utm_term=the+psychology+of+money+pdf+free+download PDF link annotation
    • https://lidiyageorgieva.com/ckfinder/userfiles/files/vixatupitanitefenuzusobe.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/sizefinedowokeratikevaxod.pdfIn PDF document text
    • https://mimpishio1bet.com/contents/files/xawobanigidafelazugasu.pdfIn PDF document text
    • http://intersonik.eu/upload/files/14197403340.pdfIn PDF document text
    • http://alltimescare.com/attachment/files/82024982063.pdfIn PDF document text
    • http://www.dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/lumuxidoxem.pdfIn PDF document text
    • https://probidjp.com/ckfinder/userfiles/files/20210922_193518.pdfIn PDF document text
    • http://koyomisushi.com/uploads/files/57058081447.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/93992679671.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/3369164101.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/a192ac0b4d7b7e61e5c010b31f2b56ba/71247259663.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135116a45f99---9667518638.pdfIn PDF document text
    • http://ekstelekom.com/userfiles/file/45292898313.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/56262233370.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/6a750e0858e88d478c4ece654084b2c1/63282500396.pdfIn PDF document text
    • https://goldengatetaichiqigong.com/userfiles/file/49912224905.pdfIn PDF document text
    • https://bipalisdemo.dashindonesia.com/userfiles/files/64656411123.pdfIn PDF document text
    • http://kalistechnologies.com/userfiles/file/5232094621.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16140eb4adee42---rabexadat.pdfIn PDF document text
    • http://abpjseah.news-read.com/upload/files/99038159933.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/89719741895.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/40134215061.pdfIn PDF document text
    • https://grup-rul.ro/printuri-fi/files/derelobobanujagazawekif.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1bf6b18a3---52557326002.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_off0000b315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB315 11040 bytes
SHA-256: 979cb928c4ed61a292286ad796545d04011279a3b5976b2f1dcecf3fcf699948
font_01_sfnt_off0000cc7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7A 14312 bytes
SHA-256: ce1c5dcd15b5de89ced511f5170722a0f7ad73c0f959122b2dda6e8f40f74b59
font_02_sfnt_off0000f044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF044 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1