Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aca7e7d60ef8d14…

MALICIOUS

PDF

80.3 KB Created: 2021-09-04 11:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: abebd62fe7f2bcbff46b28cfe083ff0f SHA-1: 90152f5ae20d16e27efb7d51b2dde66d78b4e72d SHA-256: 9aca7e7d60ef8d140c85ec5eceeeba785931f74f8268dba27c255a68f70db1cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. The file contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious or phishing content. No scripts were extracted, but the structure and heuristic firings strongly indicate a phishing or malware distribution lure.

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://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/9205c065b69138025adf0c085f075790/31804739529.pdf In PDF document text
    • http://ceomit.com/fckupload/file/tifunidanekewizevitum.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b15c3161274---34643565491.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/vehmiqkndio1ob4ok8ng7c7gl3/dinasev.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/88558023633.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900cc3c02cf---pupagajuzigamupotetap.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/dinesakupa.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/a00e6fd0f0e58773e51c2520163ee3e9/73464259895.pdfIn PDF document text
    • http://flirdining.com/uploads/files/potosapewatuxixewopimofi.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/pafeku.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c658423334---7111644874.pdfIn PDF document text
    • http://bud-drog.pl/userfiles/file/55323942162.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/20c05821d8b006ec2993f6e54dbc80b1/86210193104.pdfIn PDF document text
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/fumin.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/6dea643040d367194b187d9e0be59dee/68542736574.pdfIn PDF document text
    • https://muahohangnhat.com/app/webroot/uploads/files/bozuditelonun.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/86325717189.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/jopegizedagipirati.pdfIn PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/34473127372.pdfIn PDF document text
    • http://matras-devison.com/upload/file/mugutebexojigizisutoxa.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a5bb7f628c3---baxuliruroja.pdfIn PDF document text
    • https://webshopplus.nl/app/webroot/files/userfiles/files/bosuwotawowenefulotebi.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/ripanaxuvigamevulavi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=manual+labor+quotesPDF 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_off0000d816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD816 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF028 16992 bytes
SHA-256: 46f27e6d6c975076c7a506d8bc179d6b6d98a0f2a85bc78841b88409a488c1d2
font_02_sfnt_off00011c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C25 10388 bytes
SHA-256: abf8a26041b80cb468a6c37352531e878f7e21ff0f7b25d3b82f759d256062fa

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