Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d53c6641f20996…

MALICIOUS

PDF

88.2 KB Created: 2021-06-29 01:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 06d8f59a5d0a5b8154627ea42585cb4d SHA-1: b57391891638bbb3451efb70fa1482fa8628e019 SHA-256: 47d53c6641f2099660884e947531c82ddd69ade162c0d05ed8879ab9dd880175
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/7235f00b855e7810ca570b776ed461f5/jefifojedinot.pdf
    • http://malagi.pl/user-files/fck/file/74598106796.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/21f3302093d4a6ef01d89f27ac4bca13/sazibip.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/167ea46795552e38b7f6e44d03c46eb1/vumumari.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/11e9c49b0i6n594joj3uql6tm4/todogetezekadimaxaxitokij.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2b32912d4---74943473655.pdf
    • https://hanedantoptan.com/upload/files/6782526136.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9ee016f3466a7a91b720ac291ac03c4e/79345019273.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/04kd6nua16i4j4dtu8t9aonnuk/jixoki.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd21a8e1c5---65476776692.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/0283eead2cacbe6e6e3217cbd3428067/xipig.pdf
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607614c5674e7---40045663219.pdf
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/51b15b31693b888f52a3681e4ecad372/zabelisuxo.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab94719727---55081960335.pdf
    • http://ebslang.net/_UploadFile/Images/file/860998599.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c841910a7a---pesek.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16089513f2c781---lufedameve.pdf
    • http://constantcontinuity.com/membership/data//files/41643681895.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/lvmakbvlpnfm01jpgar58c74r0/18396345766.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7dcb8315eb---bavetotozukarexeja.pdf
    • http://webursitet.org/Files/file/76778227296.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/perg6lbrhhatis93dfhij8ps73/35182210416.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/8d04ff2f787ae6879af26e2065a9ac8b/kexifim.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607af157d82c3---misususajagatubalujavara.pdf
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16089419663303---64525345872.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=banking+awareness+for+interview+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f38d.bin
4754279274466e7ef6f3768654838291fac7aca49bef7cf9163aed2594e5c2f2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF38D 10924 bytes
font_01_sfnt_off00010ce7.bin
0cbcfb2a5d82fa126604d1f744991b367684cf59bb36bea66e01bd259460c272
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE7 17688 bytes
font_02_sfnt_off00013b1b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B1B 16792 bytes