Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b1b1d534f4faa0…

MALICIOUS

PDF

133.4 KB Created: 2021-07-02 22:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4212eb708d4dd0099a853a6186a3aeb6 SHA-1: d33a52d8cd17af46ade65e04db1618de42f880bc SHA-256: e2b1b1d534f4faa02e6f25d10b8069defa615efc6a97a4cb4f163f99180ba49a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9501

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://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/6jf4i8jr4i3ldtah1g64marudr/retej.pdf In PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a950bae9d30---71503989267.pdfIn PDF document text
    • https://ivanamihic.com//files/5175674150.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/vubunuripinuzusatutifijit.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/pepojadiguveporosugupi.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/mixiluk.pdfIn PDF document text
    • http://temple.mo/userfiles/file/60946503067.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/q4b3p813q9u3lda39lk5bfdo36/51772553919.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/36324333955.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160d32bec70d15---tosel.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/tugelita.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b78d537af---72063293954.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0be1e6b57---91705719327.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/nijuwogebatetemanolerefo.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/40531777385.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b0ef38dc291---podatib.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160902fc15f5cd---83558751055.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/1b8808475b34e2a53e9abccdb5adf1a3/25739901106.pdfIn PDF document text
    • http://karpatskiles.ru/store/files/dizotepesok.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/ctvmovl88a20tb114tight1ib3/vufasomimo.pdfIn PDF document text
    • http://prinsart.ro/uploads/files/xepupukaroxa.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/9nr9889b3ib24jd7g1q1el3f67/ponokezefurodomojo.pdfIn PDF document text
    • https://adikkeempat.com/contents//files/97776968603.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=pokemon+x+and+y+episodes+onlinePDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12513 16132 bytes
SHA-256: eb83fb48a2f60ac59fad768156047f025764cad4052c8f34695a9c8dd2456ad8
font_01_sfnt_off00013a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15292 38216 bytes
SHA-256: a0c94530f2f7fe1724e1037fef49d70173d6e365f87c80c54d44c828e86fdec2
font_03_sfnt_off0001be93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE93 18972 bytes
SHA-256: 92bd728a933c6288e4811fed52f12ba12ff895284b838104aaa046f2d9ffc4e8
font_04_sfnt_off0001eec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EEC5 10664 bytes
SHA-256: 930a472c9671f6040a66f82cf1eec24683c771fae9a595da4d2f64b15d9d2032

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