Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc7249e4af9c56c…

MALICIOUS

PDF

81.2 KB Created: 2021-07-01 14:14:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 04030a523d698ee74d281248b9099ffe SHA-1: de26b60479ce1760cb14fbf4f758028f823d1d8f SHA-256: 5fc7249e4af9c56c876a94802796c7cba57dc291397689673b00346a2a203567
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://queure.ru/uplcv?utm_term=law+and+order+svu+s22e03+torrent PDF link annotation
    • http://kentcliffordreunion.com/clients/a/aa/aa84b18e55fac3ff3c25336c5005d9e5/File/naxusakumexa.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/0b681efd8a5921b10369125532adb195/9356851614.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/94921a3c91b5b2d2f3ad16cc1345ac6b/98291592220.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/pufurezif.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9ef80752f---16814119566.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/25684064574.pdfIn PDF document text
    • https://lasanisports.com/files/xobasozitemejek.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/232a7147ca16ac12bcfb28ed31846dc8/sojaforiwibu.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16097107919092---kofasovopa.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/8feb30db76c0fb594b034c9330b3f056/56784822059.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b2f6b10a7---59816032924.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083442ea42c8---31546678353.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/2eff6a1aecc0ca4e5d7a1cc9482f6904/lanuduravirawidisamiki.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/70961500214.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be068dbbc5---tevabikokigufutalinexuwe.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/funelezinudu.pdfIn PDF document text
    • http://flightshop.jp/images/blog//file/10704666126.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609704b68ff6d---95475881534.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/67685409947.pdfIn PDF document text
    • https://lamthong-marchph.com/piceditor/file/42493428227.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/labavareda.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffb7007039---83345223553.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/mufelogesuv.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608453fccb7ca---59515228797.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de26454e47---zonevo.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_off0000db54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF366 16632 bytes
SHA-256: d3a69e8f17710acecd4504a5635bb0930a4050a6b8615cebe397019257f5cc3a
font_02_sfnt_off00011e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6A 10724 bytes
SHA-256: 1f59e13de1ba9f4b2c03e79849cb743685bd3e83094dad74e8279dae972bda40

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