Malicious PDF — malware analysis report

Static analysis result for SHA-256 674733d01356650f…

MALICIOUS

PDF

97.3 KB Created: 2021-07-08 05:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 04ffe6cb160923a9e683bef4a8454b83 SHA-1: 45b7b90792d87f8c2f6f67042919392ba05131b7 SHA-256: 674733d01356650f69796ba3e7d8abb5b2ddfdcf02729318ee69d00f8db8283f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The file's structure suggests it acts as a link farm, directing users to potentially harmful content hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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 http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a0808772722---fawonegop.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ecf7d8874---xixumopalogidurawelepoxiv.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609844c7c0125---pezefubidorozunefajitumi.pdf
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/6585167540.pdf
    • https://accuratesearch.com/userfiles/file/44181192773.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/bkkvf6aaqfst1po4il2qqea6ot/22850821909.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/uqbj240taud32kdq96c6u75br5/zoforena.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aa75a5ba685---77254545134.pdf
    • https://thinkhigh-tech.com/d/files/87187114411.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607647b263a24---88294938894.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbfffeccfe9---57728116769.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c66565fdb4---tanetobawinedomowaz.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608303a45ee14---62984773359.pdf
    • https://bititechnika.com/uploads/file/gulutajirul.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a96abf1e3ad---sasukokogosam.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/8f85f03f04bc8476fead77bfadfd5471/femijikujemidukekazexavob.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/ab746b69d08009d595e64f16c9781db7/72548967872.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072b88d272e7---78702366953.pdf
    • http://hasyo.net/files/file/69152564291.pdf
    • https://grandhotelbulgaria.com/userfiles/file/37633686527.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/c057fadd7e1f314075f4c5aab49bbcea/kizuwawigasitef.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092a741c605c---kuporinajubozuvolupafav.pdf
    • https://drsubhashawale.com/ckfinder/userfiles/files/pijevuwimujevax.pdf
    • http://slsnn.ru/content/files/17431152486.pdf
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608770aa44dbb---sebexovivutorogixafegor.pdf
    • http://93564497.com/userfiles/fasev.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=article+review+guidelines+pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001183b.bin
19f0e327904ce625d7d803b609e05582d132bae42674a817aa2fff2780b5beb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1183B 17728 bytes
font_01_sfnt_off000146dd.bin
321fee5ff8ce01ce88124bd69149cf9596131e6c8fd16dd7e1aa6c340836012c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x146DD 10748 bytes
font_02_sfnt_off00015f8e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15F8E 16792 bytes

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