Malicious PDF — malware analysis report

Static analysis result for SHA-256 00447fde4d0b9611…

MALICIOUS

PDF

86.1 KB Created: 2021-07-04 22:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 379c7ba3ee1cc5044eab1201fed2f5cf SHA-1: 46add5b366e24d3dc99d85114f6ab5decdddf603 SHA-256: 00447fde4d0b96114aa943475ebe27cd8b44e7d9b1fffd4f31710a177d7c44f0
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised websites, likely serving as a distribution point for further malicious content. The presence of numerous unknown URLs suggests an attempt to obscure the true malicious destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91752c5e07---67780773971.pdf In PDF document text
    • http://vector-luczak.pl/new/fck_user_files/file/revaxekugobefijoxepuranin.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/523b0ed29b2ed6fb9c545a7ea30dbc4b/99423340534.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfb5b158f9---mijubuloda.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/4450fb70cca00bd11592a9db831be6dd/55105536276.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/78724988122.pdfIn PDF document text
    • http://arablift.net/userfiles/file/11910027745.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16093ce1703b67---10354292509.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/06ufuao32igfb1rambusb9oq45/19809591765.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/ravesawakitoliwa.pdfIn PDF document text
    • http://phaptangpgvn.net/app/webroot/upload/files/xefeposez.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607038d82350f---sukakusitatijoripi.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/lebokeseru.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/cd5528b505181d13b093330782f70c7f/tibotalenisaguxip.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/kolutunupupenotusivoz.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/cuphiqn2lfd80171v6fif5qigpml9b47/zugekasateberijovovoxodo.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/2d8605552af4c3dceb15a6d0fcaee797/53802739968.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944893992d0---78200112488.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdee1e5407---40122993588.pdfIn PDF document text
    • https://istanajpdua.com/contents//files/76642453511.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/098945fde4fa3c082e6c934dc481f80f/jepuwadewujigonokinuk.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/pubejane.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=blood+and+water+full+seasonPDF 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_off0000ecab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAB 10492 bytes
SHA-256: 0269eb6393f6efccb6ed8c2da86071b219d198c04d37fbbede1f77e2bb17b102
font_01_sfnt_off000104c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C3 17684 bytes
SHA-256: ba870444ecae4fb206e1a8c8b8bc664cd7c0ff5e2d612b3f41e78445d3cdefbd
font_02_sfnt_off00013350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13350 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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