Malicious PDF — malware analysis report

Static analysis result for SHA-256 c07d8a88ab244045…

MALICIOUS

PDF

86.0 KB Created: 2021-07-20 10:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 15aee7ea8ceaae3d6993c2e9ac8595e6 SHA-1: 4cabc204ed7086d9195431a51ada8b94cdbeb517 SHA-256: c07d8a88ab244045303c8eb389231d81f8ad5af4907f5e8877926a19c1495e8d
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, with many URLs pointing to compromised WordPress upload directories. These links are likely intended to redirect users to malicious sites for phishing or further malware delivery.

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://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b52e2578ef---54644282490.pdf In PDF document text
    • https://globalmediaminds.com/uploads/files/sogolatazirudemonar.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/17741223373.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160be4d6f7c17c---31970931525.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/bpmcegpg9t0bo2s6fsbvg5ovk4/kiwewarodavawofugutapojug.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/1c49d75034b07a57f1c834a45804d384/nutazamafomowi.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/boxobudej.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160747c4e84d89---18835819519.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/bedemojikonupubamet.pdfIn PDF document text
    • http://samafb.org/uploadfilefiles/xetubeveb.pdfIn PDF document text
    • http://yilip.net/userData/board/file/2557436531.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160ac7e61df652---dusemujufovokabiwejiledop.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/ucicrohr05anvuirhiobl0b6pd/tagubepuna.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/42914882421.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/16121002274.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d215e45394---purokisoperokuve.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/e43c0dd08e6c391c5e5af585c87776d0/74829648590.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/likebafanerogixoju.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cc3379473---31290904993.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160899ececbcca---79330654924.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/442dffa9be55f6e0a396caac233a4edb/rofusabawuka.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0a79f1d15---vazovotirifa.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/b7cm6gpoao92cd0d2ebta9dksp/30003536628.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f655f333f8c---mosofix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=compulsive+narcissism+meaningPDF 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_off0000ece7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE7 17176 bytes
SHA-256: c286e7358e966e0376fc651632fb0515733f3dcef8f8496eb38e1b4924756468
font_01_sfnt_off000119e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E1 10816 bytes
SHA-256: 526ae8dd366ea23988e34b3715cd0872f8d3d7ce9634edeaebfe6b2616b73076
font_02_sfnt_off000132d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1