Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb466ccbccd2cde…

MALICIOUS

PDF

82.5 KB Created: 2021-09-17 06:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: caab58b96cbb0461b4f9d80860ed197d SHA-1: 9d019a856c8226e6a3cde69f721e1f27fe589649 SHA-256: dcb466ccbccd2cde4baa2b84257d001116b4350d5178577d07abd4ea0eb06d18
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF that contains numerous links to compromised websites, many of which host other PDFs. The presence of a 'download button' heuristic and ML classification strongly suggest malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this, indicating the document is designed to trick users into downloading malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143c46524d1c---duriviluko.pdf In PDF document text
    • http://sccsfz.org/upload/2021-09/linosexonolowakuw.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/85884421717.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/161350ba1927f1---fugidaxusogan.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1f2c243ed---55497736966.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/dq59qlndfaoc7mbq0bs2bk2d8n/dewonaxozetolukoli.pdfIn PDF document text
    • https://cooperspick.com/files/28056159583.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/renowuwakus.pdfIn PDF document text
    • https://adetexfoamgroup.centralcms.cloud/galeria/files/nefisizawa.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/mipomulezepotawujal.pdfIn PDF document text
    • http://nuovartea.eu/userfiles/files/xijipuziwunopavu.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/059449049c3e55b051c4f3918522cf44/datuzifira.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/6ep5djjmchj3b08t16s8pbd6oq/24382780047.pdfIn PDF document text
    • https://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/raxavukuxozuxozilazi.pdfIn PDF document text
    • https://gppacdatabase.net/userfiles/file/bivikeduruvalexi.pdfIn PDF document text
    • http://eszixv.hu/ckfinder/userfiles/files/xitolagapodomif.pdfIn PDF document text
    • https://xrtradingfeedback.com/cmsimages/file/41331354620.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/32560143524.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/xajawilokubedefudomuxedog.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/sunaruvivisefanusilenus.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/29798888682.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/62312042435.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/40434892995.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/dirozuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=kimetsu+no+yaiba+movie+free+watch+onlinePDF 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_off0000dbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBD 11096 bytes
SHA-256: 793cd49ed2172f02d3c148d0c6a3cd8876af2733d6a894bba3f872c2b9685290
font_01_sfnt_off0000f588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF588 18080 bytes
SHA-256: af1f6a701ae374a24d04ae5abe50697f445cd3d592774968dd8b9a3c640ec3bf
font_02_sfnt_off00012471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12471 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.