Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe50ff1d8c053e9…

MALICIOUS

PDF

83.3 KB Created: 2021-06-16 14:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 4ea3d60adbc3be3da65b07468ea5fefa SHA-1: b58384e55468a43cb636a72c5909184ba923c73c SHA-256: dbe50ff1d8c053e94f360df3012c4aecc27b9d1ae5169b4b35ea261f9ce76aa9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://krisoc.ru/uplcv?utm_term=nara+e+takbeer+allahu+akbar+naat+mp3+download PDF link annotation
    • http://alnoorcity.com/userfiles/file/bidovixufitini.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5a6b3fe50---ramekegizowatopovixudazu.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/44e3cf765bf46f078952ee286582c2ec/52380701855.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45a522e0e0---senopixil.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/35223965678.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/cd7f9aee1553973e5844f588079aace8/60623112659.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/7ef7fadced6e09e80d5790bc39cab630/11515086404.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f837beb01---vumewod.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/416325977.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/f8c482699ab0f3538e322fa6a10650ac/63050528377.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a91020bf8d0---21688394155.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16072bcc971af6---sogowalekoteromiruxegote.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814935b69b7---sawifazebipilenumijov.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/2a1446716231f0e78c2d2e05c480bf32/29852315354.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/lelevujenomimufoke.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9bef85922---37701465794.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C2 3040 bytes
SHA-256: 60e449f7a8b0e153941437b1be5a1637dfb060f3e7d3893b296e988bc6be34de
font_01_sfnt_off0000e392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE392 5448 bytes
SHA-256: bfb90abec4fe2675df9c593820f589ae6529db9fe6188fa11694f4fd99f51be5
font_02_sfnt_off0000f601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF601 10904 bytes
SHA-256: 305f996428d3fc0f70e0e6ff8d25c1e6b2ffbfc576ba4fea9864dbcd441a48e1
font_03_sfnt_off00011ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD1 16788 bytes
SHA-256: 13d8463f3b3d0f2af1fb5cc5e36eca73fd36492cc4502ec8e01e1a7c33869652
font_04_sfnt_off000132c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C3 3308 bytes
SHA-256: 3bb6ba61df581d8ba310d02057e140aa2157aea1861176ad0fb25832d2503159

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