Malicious PDF — malware analysis report

Static analysis result for SHA-256 e886187c502f5271…

MALICIOUS

PDF

87.8 KB Created: 2021-08-06 21:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 47bd8953ba455962484332e37c046534 SHA-1: c4997470f06132646f0cc875382966bc7f064e5b SHA-256: e886187c502f5271aff6070c63491378224241ec18e6eb35e3ad84f01c6462e8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a malicious PDF detected by ClamAV as a phishing trojan. It contains embedded JavaScript and a large number of external URIs, many hosted on compromised CMS uploads and disposable domains, suggesting a phishing or redirection scheme. The embedded JavaScript likely facilitates the redirection or delivery of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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 http://parkettes.org/clients/b/b3/b30d687fb0e6fb0c44210170e51784d9/File/xudoropeluziwenetibat.pdf In PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/b6ea7951d707dcb992a2f72be29bb295/21171332387.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/12407523373.pdfIn PDF document text
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/46579666657.pdfIn PDF document text
    • http://labonscafe.com/userfiles/53855959645.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es//ckfinder/userfiles/files/keluwixadixawome.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/63660487523.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/2f0d14f6d4366e0107c928901956ab02/gegimaparinewaw.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16076ee267cd32---65869733928.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///xelurotezudagebukilenabe.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/nixizazigisejalej.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///7130633065.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16085485795433---kugika.pdfIn PDF document text
    • http://speed-r.com/js/upload/files/wukanak.pdfIn PDF document text
    • https://isleo.com/i_photos/file/muwugafidiruxulubog.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210716_C962033D55C3AD38.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/ca53v31jh3iqgequkjso3f6rb5/83480662819.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d65e861a77a---95901735247.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/91f9cf55207e7b31b09aaecdfdf3ced1/lebufixugovomirubatu.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/83443bbc6660d316bcf0b5d4eb4c1126/53600691934.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/mumaloge.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847e781e432---besovaworijerupetizabonu.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/34019774851.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=alcatel+go+flip+v+user+manualPDF 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_off0000f07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001088e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088E 17408 bytes
SHA-256: 909977b37ffaee6c15034d37b84cc7b73c2a78a6002b75c82d4e44c8df4f5b39
font_02_sfnt_off000135ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135EF 10968 bytes
SHA-256: df1780e2617934dd95625bba4a27f23742264d6d26da6f0445b5d3659ce2f5d5