Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ac4a5abf388d4e5…

MALICIOUS

PDF

86.9 KB Created: 2021-08-25 13:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0f1303b69364775cfc7cb6533b3c7448 SHA-1: bd0f6e0de9629452e76253a8a56e91df19a7d1f5 SHA-256: 2ac4a5abf388d4e5dfaf29f6e80e98ba8b62f818483601be243646ac8bf32483
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which point to compromised WordPress sites or disposable hosting. This indicates the file is likely a phishing lure or a redirection mechanism to malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cructi.ru/uplcv?utm_term=cleanliness+and+health PDF link annotation
    • http://wasserburg.pl/userfiles/file/14492881946.pdfIn PDF document text
    • http://abworder.com/uploads/files/todofa.pdfIn PDF document text
    • http://w3-japan.com/js/upload/files/mokivodojuba.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/08a3d0686af2de2c87efcd16f0c37af3/wesesaz.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bcee1b07598---kaxenogowefud.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/jodoporo.pdfIn PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/6157001997.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080619976cec---gatufimozaxedugutusepuk.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607791ee900fc---51094365715.pdfIn PDF document text
    • https://centrumschoolka.pl/photos/file/miponex.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe1bd95323---nuwexebed.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca0abbea8d---fadenetevi.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/kulusizudigekidebodi.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/51859910033.pdfIn PDF document text
    • http://satthachkhe.vn/image/file/lixojosomemid.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607463d1a1c18---wumimuwi.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/40067239955.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/tamafiliwe.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abfd5930187---28747546979.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/98339414262.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f204b9eff7---58848047865.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c854aacedd6---botunonukeniloneze.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_off0000f16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16F 10156 bytes
SHA-256: 406963a0914217794cfcc294718528658e8324c9687607aa7d8f7385860b2295
font_01_sfnt_off0001080d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001201f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201F 18056 bytes
SHA-256: c270f40e6ddee566d5fe0a55fb1d8d409fd3d953e338320e24aa1c6f8ee30847

Open this report in the interactive analyzer, or submit your own file for analysis.