Malicious PDF — malware analysis report

Static analysis result for SHA-256 119fb774f891b210…

MALICIOUS

PDF

76.3 KB Created: 2021-06-28 00:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 72ce0a4b3e5b2b2f53b5c197239f665c SHA-1: c39088d61230cce774a990db72c8476d481b2cd7 SHA-256: 119fb774f891b210cf2fec04976b3b1209a669db7706fadc164bc1368613a554
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous links pointing to compromised WordPress sites, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of 'utm_term' in one of the URLs indicates a potential phishing or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://crysiq.ru/uplcv?utm_term=the+alarm+went+off+meaning PDF link annotation
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce258de6fc---23530910104.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b41dbaaa02---kuwewisakizokugare.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/69199e5090a491924b83e0f110b1aa24/wanarobelefuba.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/2c4d9250d60b5ded580e02c29e6d77cc/gogufavabomawepovuba.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075875d4b79c---91261745721.pdfIn PDF document text
    • http://aimic.com/userfiles/file/93562300329.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/tedaviremajogukujina.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/u92cs9rhdth63dfcm864ij9uc1/59355733699.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608f119f9adf6---90356038978.pdfIn PDF document text
    • https://okvino.it/file/kogijejosujeg.pdfIn PDF document text
    • http://www.toptehnik.si/images/11548888717.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/mogojasanoporaxa.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/vukuxod.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/kedoniwulanapokad.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/surofexijororasavunibud.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/50592684180.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b2bb78602---fiwolakinamala.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/95062202522.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210602_8AF5D33D0F1CBFE1.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/1e1fdb04db4c49455307a4b5dcfc7166/18663265049.pdfIn PDF document text
    • https://ka-base.no/images_content/file/lupavenepefuw.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607420f976cd8---libijelimogetasuliwuxa.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b7780fa598b---8497804536.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160814e731820d---26430321005.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/zerukov.pdfIn PDF document text
    • 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_off0000cb38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34F 10544 bytes
SHA-256: 10f0a10e30cb34d48eaea7c725d708da4446c70fbe3693bc7ca040bf1b43109a
font_02_sfnt_off0000fb31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB31 15888 bytes
SHA-256: 82e2b62f95a7566d0a7c8cb5a5953f97ea5d91a74667d7214c2dc752f839b187