Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f093d7745e3bd9…

MALICIOUS

PDF

87.7 KB Created: 2021-07-24 07:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 623151be505789b9cdbe6db1efb8fe53 SHA-1: 4fd698a25469c7ad6cae8cf4a9b9529bde4bed4a SHA-256: 64f093d7745e3bd901c7d06aef37a221022afd4afc5d8c22b7a8c6f54a71d335
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1140 Deobfuscate/Decode Files or Information

The PDF contains numerous external links, many pointing to compromised websites or disposable hosting, suggesting a link farm for phishing or malware distribution. The heuristic 'SE_SECURITY_BYPASS' indicates the document instructs the user to disable antivirus, a common tactic in malicious documents. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification. No scripts were extracted, but the overall structure and link farm behavior point to a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://fitnessklub-impuls.pl/uploads/assets/file/42254377439.pdf In PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077193e7280b---93731463895.pdfIn PDF document text
    • http://thuocnam.xyz/images/files/fuwupatuwod.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/rapagajanesaf.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/07decf6575b4bf7a4dd16e25e56e0044/96477487711.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/movabub.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/c1af99ef3901b28f568029ddf308b0fa/16995920802.pdfIn PDF document text
    • https://turkuazhost.com/calisma2/files/uploads/varivas.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b19adbe5d91---85687216933.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a83e2f6d2eb---pezefifovinovirusokara.pdfIn PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/5vdq3tvfifvcqbpnov3lc17m2o/mepunu.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/xivadumorakexapila.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/96129178351.pdfIn PDF document text
    • https://777mto.com/contents//files/84480394962.pdfIn PDF document text
    • http://cokhibaosang.com/media/ftp/file/86191475792.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/c56e9e5ded3ee2bfb030865f452cb621/91233870876.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160921fbbd476f---bipekavawolefegixuwewibor.pdfIn PDF document text
    • http://bougerpourstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/2549101516.pdfIn PDF document text
    • http://d4squebec.com/clients/f/f5/f58105ca183540932673f5bf18e62671/File/39442070309.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05c512083d---30325940729.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bab2573f97b---25981213226.pdfIn PDF document text
    • https://istanajp.com/contents//files/fufuwuzikokiv.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160dccb287b970---xotax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=a+dance+of+fire+and+ice+free+online+versionPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF063 18272 bytes
SHA-256: 12d423ec894554cf6c5c93ab134beae8b4be92647149b17daa1e5603327dc9ad
font_01_sfnt_off000120ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13916 10416 bytes
SHA-256: e32657c9cfd35df17c263252af4f75c2e4c7c7ea06d462847ca3b41eb410b6b2

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