Malicious PDF — malware analysis report

Static analysis result for SHA-256 e493f27199a98784…

MALICIOUS

PDF

70.3 KB Created: 2021-09-07 04:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2c44a66287feb92b2d77294c6be09c0f SHA-1: 1207fb4f3894b0decc1a94a07be4d9d9d5abbeb3 SHA-256: e493f27199a98784b8c65439ecc0dadf37634f18c0125cd5f77c86ee79e09407
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://cafehinglung.com/uploads/files/25097810167.pdf In PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb0b2a8560---99701456554.pdfIn PDF document text
    • http://michalbaryza.pl/ckfinder/userfiles/files/sidisojoruvanet.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/32042324753.pdfIn PDF document text
    • https://rkdestate.com/userfiles/file/nojiviku.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b37d633e4---36958175348.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/41377125230.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/26228815064.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/kapumenazo.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/ba7edad761d9f9c2af92d88f0e1ecd84/28606999223.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701f4ec68c9---72004760882.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/barofosedese.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/18453010318.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/lakisepibitezopajisu.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/9fdded275c3781b2220b85bbfbaae69b/80129314518.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/satekepomujuvun.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/d75a138becef103ac254f4b69bc7b4c8/valepofolamox.pdfIn PDF document text
    • https://excore.hu/ckfinder/userfiles/files/18616339110.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098c6c19296d---6338634993.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/gexepe.pdfIn PDF document text
    • http://spiregene.com/image/files/20210731_060158.pdfIn PDF document text
    • https://thuaphatlaihanoi.net/uploads/files/96066338327.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=libro+yurupary+completo+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB08D 10820 bytes
SHA-256: 32d06a9dc5e3d61f95b7fa05c6dc333aed454c8929b2201e046e89afcb5ea081
font_01_sfnt_off0000c95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16E 16636 bytes
SHA-256: c69b2cda85e7d9e892739a840fa7fc90fbdf87f309fca76d1f9830a56b8fb60d

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