Malicious PDF — malware analysis report

Static analysis result for SHA-256 13ae193dedabcacc…

MALICIOUS

PDF

68.3 KB Created: 2021-05-07 23:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 057ea16029cc0c18bc7029b352560ea0 SHA-1: 7922f9ab8f5e173e10e6804e9de6956f1c52e576 SHA-256: 13ae193dedabcacc2bedae6f6a0853923b5867b73defc1054cd3755b7e4b0b0f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, appears to be a lure related to search results or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/pto4c4tfkpbs76l70nun2rtamm/73216196167.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/5612b9f19ca61c0859521f4d115e49b8/27891608355.pdf
    • https://people11people.gr/uploads/File/89872077343.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb65d69cf5---tudupuzaxuxukavowewilafa.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160700c6d36dcb---93615110808.pdf
    • http://geose.ru/userfiles/file/9978821206.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/7finig18l7cnncml9guiujlob7/43500854373.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16070f87e9c7fe---92303193636.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607132d0160a0---40418267213.pdf
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/a52ce6a3387ec954e1b2b8e88152f74b/riboguxa.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/beb95f93b9ab1978950478dd8e3a024f/vanejogojutujod.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16092a3581b8d5---witovisofajaratezegeg.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8a23a78f1---karuputufuxoxokot.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/52ae807179b8cbb271a4661c8e264b33/raxeletaduvu.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160833c35a2e4f---17602067676.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/c369c8fad1ec7584d87daa2e500f7b8d/23075759506.pdf
    • http://montaze.org/democms/userfiles/file/85700329422.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=kathi+sandai+songs+video
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce6f.bin
eae82b3e0a0a1e1e832c023f802023cf16d2f090ac461f6ac8f2659bf112d904		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6F 4988 bytes
font_01_sfnt_off0000df74.bin
5b4f531e58f45b0aef1a9926481b17dee8262fee50d18f0c8bd376b525eedece		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF74 10980 bytes

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