Malicious PDF — malware analysis report

Static analysis result for SHA-256 22777529127a432a…

MALICIOUS

PDF

81.9 KB Created: 2021-09-06 14:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fbba4efc6d530fac8f3146426d7d4487 SHA-1: 659b87112f135133f7cafeed728316a4b8e1b1ae SHA-256: 22777529127a432a9f3e0fbdef794099536993f96f9ab5b3b1a82520d40a4607
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for delivering malicious content. The heuristics indicate that the PDF links to multiple compromised websites and potentially malicious files hosted on them. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/badae9d5c136393c43e86ca8008a9adc/totevafupegexapadab.pdf In PDF document text
    • http://bazis-expertiza.ru/ckfinder/core/connector/php/files/jafomufesuzubirimabe.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/90539711332.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f16d993bf2---31595640358.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/d447e07b8121e6eafcbc0bc2c718394b/ralotixerepope.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/81d2defd69e78253d341d6e2b2e8cb68/pifojozivogu.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/dogexidegipoluven.pdfIn PDF document text
    • https://longhoang.vn/upload/files/23359286765.pdfIn PDF document text
    • http://whitebearlakeclassof1970.com/clients/0/05/05755deafc47004aae723e515cf08a6f/File/lofomavodatimolesu.pdfIn PDF document text
    • http://chichen.asia/ckfinder/userfiles/files/39804584453.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d00dc624a92---46383860655.pdfPDF link annotation
    • http://kuppersbusch.hu/userfiles/files/54006392638.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/vujetinemowirewos.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/kufagewojibazej.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094b01736259---21323584837.pdfIn PDF document text
    • https://mashtalkandil.com/userfiles/file/67239819651.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e47ac0da8f---21066746441.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/vimowag.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160985559dc3f8---velitaxudifesimadus.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/39819162156.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0006fb7f7c---pagutitoxiva.pdfIn PDF document text
    • http://topp.pl/_topp/file/bagejorubi.pdfIn PDF document text
    • http://printrun.nl/userfiles/files/wasositotuzigaji.pdfIn PDF document text
    • https://tinhhoaxanh.vn/userfiles/file/77697308583.pdfIn PDF document text
    • https://denimder.org/resimler/files/dusikoxujagomatefu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=acer+aspire+one+d255+manual+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0C 17968 bytes
SHA-256: f3bbaced8068e23b9e5e043e7b9dfc7e7e8431d2e1527954a20c1c59abde9307
font_01_sfnt_off0001084e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084E 11016 bytes
SHA-256: a2ab083e57637bdcecb58ed1a23b37e448ff6bc266ff6a2ff5dde6c5b42c332a
font_02_sfnt_off000121f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1