Malicious PDF — malware analysis report

Static analysis result for SHA-256 0900f698eeac074f…

MALICIOUS

PDF

91.9 KB Created: 2021-06-26 10:01:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a3589e4cbb3471da51f1c9fac5c12ea3 SHA-1: 88193714a58d8096bcaba6c2b3fe3a7c536e29c5 SHA-256: 0900f698eeac074ff5d7e6c4841c2f9bdcc73ffb429b399177f8475aec1abf2b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the document's structure and URL patterns are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/ce89f527e191afa223cf38419b63e320/pikibisitomawomufofomab.pdf In PDF document text
    • http://uk-finansist.ru/userfiles/file/navukupalixifibixepiwamag.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084284b4a98d---66764677675.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/44681744851.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/73230305549.pdfIn PDF document text
    • https://avela.md/userfiles/file/vivagukexedeguvebenav.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608d64cd4a3cb---81635586426.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/79243941015.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/8d3c4376985119cd0e8e7d17a2a727fc/23033899819.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c89574b351---87768574391.pdfIn PDF document text
    • http://prestopc.it/upload/file/kipovij.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160788e3e727d4---20159639400.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/23642700713.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b18a73b1fd0---87659672770.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac40377b2cb---saluvafibuvoreken.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f4f96eb100bf9958aedae8ed1b2b8776/lomifiroriv.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/a887940d4bcad84cd50c4f2b295bf2c5/busef.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/ronis.pdfIn PDF document text
    • http://moscowprice.com/content/xuploadimages/file/guxapesagibadesufe.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2578c934b8---bizidu.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5524abb83---xapejolulaxarixagupif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=meet+the+browns+play+funeralPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/9419dbe87ad4e1c16e8995ff11d87739/56649591835.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_off00010367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10367 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B79 17604 bytes
SHA-256: 1200054990a7a7c96a5c55bf3f168113c0abcdc3ce8913c667c74a9c926b4b52
font_02_sfnt_off000149af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149AF 10796 bytes
SHA-256: 2186ad3fd20c9d960b60a7d02ef296797fe713392427a5e9bc207248e6a13bfb

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