Malicious PDF — malware analysis report

Static analysis result for SHA-256 05abdd6651f4b272…

MALICIOUS

PDF

89.2 KB Created: 2021-06-27 14:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c2bcd7b98f16854cddbdbeee44d9fab0 SHA-1: be69f6a6c2f73d66d2bd505f3d20061c81a99e66 SHA-256: 05abdd6651f4b2722f6561c6d1e54ba87e1a8cff7fada9304820ae9d6d33c79d
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other potentially malicious domains. The embedded URLs suggest an attempt to distribute further malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/969b26533c5bdf640db1a83e280b2a08/96175084602.pdf In PDF document text
    • https://webmenuplus.com/images/file/gafilifu.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/wolujonosijejodelefoxolu.pdfIn PDF document text
    • https://elektrona.cz/files/file/gezikivixotaxemikupon.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/burituja.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/96021867912.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/65299668fb1183ca7f078f268b9e3862/57721982328.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/i2fmvtjglivh3259gdfgf5ao8o/rurefufinumonevugurumu.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7ad48361e---71480668357.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/59148510606.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/6be2f6315f18f5d096dee02cef6582b0/7329115250.pdfIn PDF document text
    • http://penzionriverside.cz/files/file/povipafinekifevadejanik.pdfIn PDF document text
    • http://zonweringbelgie.eu/ckfinder/userfiles/files/wosivodosu.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/8d96c7c4275a1eec2ff1e026e9df72da/nakusosedogifo.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/jrn30rhhlkstl9b9bl8jna7sg2/83127462107.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/lotepulawufevi.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083362b68fc5---11208389227.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b8d88b81b---39308173170.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083929c2fa34---puvekugotefekigexexak.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/33421445947.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8bb99baf22---bevepogi.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/suu87afsi98hqp6rsstr38qs51/kivurenebuno.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/jagujositelozejutiwat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=common+digestive+problemsPDF 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_off0000fc47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC47 16548 bytes
SHA-256: 4b2f0c7e02b006f4e295f18961bbd1ae677043b45ba5542bc3d0d2f9bf34828a
font_01_sfnt_off00012723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12723 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F3A 10808 bytes
SHA-256: e2e8de65a7cd4975579f0c785a8742a6cfebf2290bb4b145664fa39eca41d63e

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