Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c7ffdf1ff2bb53d…

MALICIOUS

PDF

98.2 KB Created: 2021-07-05 22:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e58837b8024b5fd6384266ce7daac02c SHA-1: b99e585867e44c9e77aa560d775fe5f9b99e803f SHA-256: 2c7ffdf1ff2bb53d478a6c285da6b7ce2f0c16e3c845e0f223dd5f8b6c97c5c2
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The file's structure and numerous external links align with techniques used to obscure the ultimate destination and evade initial detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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.
  • 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.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/68gvtfcha7jag93fsu9o15cjjm/38016310961.pdf In PDF document text
    • http://benevolo.it/userfiles/files/78470255898.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/71645702236.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/2aaf3e18bdca638eabcdf75c97135f08/nugabikawabewo.pdfIn PDF document text
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/nmioktfvm4rh4p7oap5366193h/kotesewar.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/vilomejuwuva.pdfIn PDF document text
    • http://cl-pub.com/files/files/lapugesuparuvigak.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/59ajv3vnp47ob2ile0hp3j5pu5/84455001736.pdfIn PDF document text
    • https://alutat.com/data/file/wizegonokeditakijobumowej.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/79235919612.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090af6d7050d---pivosekuzonomesit.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/46185131232.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bba7a577658---1737596254.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/43181195238.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/5012839228.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094477fa5cd6---nulojamas.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098010f8f9d5---48325572830.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1606d817f5fbf3---71914168230.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7d2b5d5df---12526914761.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=crazy+hair+dayPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE488 20152 bytes
SHA-256: 9f60dcc087d79b3747daedbf9a0607a7e0b159fb27ab71260c82b83ad8941749
font_01_sfnt_off00012046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12046 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001385c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1385C 9884 bytes
SHA-256: 8ee241fe63d76e0ea32bbc25e0b067eb6ec1b8726c9fe453f3aa20af947dbaaa
font_03_sfnt_off00014e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E3C 16500 bytes
SHA-256: bd8c5f111823e7623100c481a820b599ea716cfa529b540c874651aa74200b21

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