Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae1953b724cdd48…

MALICIOUS

PDF

77.7 KB Created: 2021-09-03 08:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9df1874abfa72f586de0e99bb61e4b55 SHA-1: e61ea2a82814f71575850709065df591e5859c6a SHA-256: 2ae1953b724cdd48d97ef0f69f43a5a98da080f91031b200604b02ab5455da7a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as 'Pdf.Phishing.Trojan'. It contains numerous links to various domains, many of which are hosted on compromised CMS upload storage, suggesting a link farm designed to redirect users to potentially malicious content. The presence of these links and the overall structure indicate a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://markzone.az/wp-content/plugins/super-forms/uploads/php/files/um76ojvgr22t7dfk79scodfajg/lezanokixepasalukadepizip.pdf In PDF document text
    • http://pytextiles.com/userfiles/file/vonabomo.pdfIn PDF document text
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/9cdde911d36fa165d0fd549aa38d85ac/8294823926.pdfIn PDF document text
    • http://zae.me/datafiles/file/jepoviwa.pdfIn PDF document text
    • http://castel.lu/userfiles/files/pegikazeviwizaravet.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b21f6df27a3---fudidetoxubajujo.pdfIn PDF document text
    • http://www.petersonassoc.com/emailimages/file/vugoturolidunimaref.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b082fb727bb---50046328374.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/26374615809.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff055f2109---83658341515.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/v5ag8pssg24lcs774o1ksnddm4/doxanorut.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/fudefenoxevinowi.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/050c6dd0be55091f09181778a8115e27/58323109108.pdfIn PDF document text
    • http://elskenecologie.nl/files/64099867880.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/e14505a8bb4429ff22dbb5464fca73ef/jazudemekazibedujujafefo.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/zubofodo.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/36660567751.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1610a9bac015d5---pefanosopep.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a200c776d31---98338288031.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d2c7c0aea---sifitulotolu.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/kojapazenitesemopo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=free+english+grammar+worksheets+ks3PDF 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_off0000cd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A5 10884 bytes
SHA-256: f07d17adc6ebaee20f4027c4d8d629d84a2a2b10a1cb2b1cd82600c2e103bcdc
font_02_sfnt_off0000feac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAC 16640 bytes
SHA-256: 5dd17bf0450132056bd29811744ae9f51d0ba9cfc1983460e85c116ea6568e55

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