Malicious PDF — malware analysis report

Static analysis result for SHA-256 3af3d5ab847a78af…

MALICIOUS

PDF

122.5 KB Created: 2021-06-28 04:19:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 76a785d89d97bce370bbee13a0d678ee SHA-1: 4cacb2f09474631dbb8c4cbc71106a9b2455cb4f SHA-256: 3af3d5ab847a78aff2bfd5d2ec70394bb8a3a0cc586be07621db75d7026651c1
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9576

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://allytemp.ru/uplcv?utm_term=bs+7671+free+download
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3114311fd2---31778454849.pdf
    • http://alimentosldm.com/userfiles/file/fafivumipefufisa.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/7aedd8e573aa34e53734bcb0a3d65ea1/vadusetimize.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab4b4b85a8---74709002522.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9b247c87a---90154525972.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/9ouuep2813jk2agdubq6682rfg/90721509555.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749ab1b98ab---wokuwuxonuzovufuguvosi.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16083248aab37b---joxoriv.pdf
    • https://a5productions.com/home/a5pro/public_html/ckfinder/userfiles/files/21505505412.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/e29c1cec05fad57bf3e7a44f7f901e8e/kurubal.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608272caeedfc---49207428855.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/i4ovtfirpm65dcv9l69met46f4/1920149706.pdf
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf9de77942---durelogomewutazadopif.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16084cf4f57030---doxatudabupojevefojikuka.pdf
    • http://bugaboo-buffalo.eu/UserFiles/File/5939467910.pdf
    • https://lasanisports.com/files/7972099392.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a6dce3454---siweminigatiw.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16072aa7f497b6---gisokodarilozagadokigufil.pdf
    • http://partnerplus30.ru/images/fornews/files/83205789969.pdf
    • https://jordanadams.com/ckfinder/userfiles/files/49539626611.pdf
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/99f855c7ae7d518a6e40973c36f64d07/menomobazale.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160882f9cd8212---83986677705.pdf
    • https://communeouchamps.fr/userfiles/file/55539806103.pdf
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/87324039793.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000158ca.bin
27fa49ca30b1f57c6e4f8b99ad1f73ead7010ce1f191e20d716503af09158f46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158CA 16160 bytes
font_01_sfnt_off00016e3a.bin
d2cecab89d545940a95de98da872d87681cc5234f48498b83c99e5e0fbdd8d83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16E3A 2308 bytes
font_02_sfnt_off00017875.bin
685f02fe934007f0da3930efdfe4766c5d69502b4f0a8030ec904364ec3222c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17875 10568 bytes
font_03_sfnt_off000190e8.bin
306e71f7932d3add7fd42c2c72a6d9fcfc72c5a5cdc3977456bcc876c94ceef2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x190E8 18132 bytes
font_04_sfnt_off0001c0fb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C0FB 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.