Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b96547aa1e0fb7d…

MALICIOUS

PDF

78.9 KB Created: 2021-07-08 03:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e006b14035e6c570cc1b113d00122b5a SHA-1: cee01b7d852a29ad18a86d843f68765653f28885 SHA-256: 2b96547aa1e0fb7d5b7993d9a9fe0da2cf23561c9877a063fcbd0e53c5c446ac
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, designed to trick users into downloading further malicious content. The presence of embedded URLs and the 'Download Button' heuristic suggest a phishing or social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://smidgel.ru/uplcv?utm_term=engineering+physics+by+gaur+and+gupta+pdf+download
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/cf08d07b9b1c97bc0954865ed9890f00/61676003596.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a81b097c751---79411364695.pdf
    • http://3dprofi.net/images/uploads/file/95009399628.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/ae48d13307c6585a690b4de17553e0c7/1042618409.pdf
    • http://www.vegagastro.pl/upload/file/47436750163.pdf
    • https://kitapkaplama.com/upload/ckfinder/files/7353676254.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/b0f531076b153852a957460cdbd10050/dimor.pdf
    • http://kangs78.com/clients/66216/File/24756865827.pdf
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/2d23988d714824355a862498900e800a/51256002444.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/1bef6021c667dfe07a2b4aa59ecd5dcf/45354663141.pdf
    • http://uro-medical.pl/zdjecia/fotki/file/lekodelumupemijirave.pdf
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/001026319d9749a41d03f98956c77387/gijewigagebewejurakosize.pdf
    • http://anhuicrew.com/upload_fck/file/2021-5-12/20210512030158198508.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/58009a35ae498f9ba9db1a55ea6e2a2d/177184730.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/ae9c39526d6a638f5fad5faf74559dec/23772550606.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caa68385a82---viwajidixapupopa.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160917f14922b2---supatoranalupepalaforofef.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/673ce3019e8abd399863edc37293b8c4/55004849194.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aad79009133---wujad.pdf
    • http://www.aluvascientific.com/UserFiles/file/fotukotizogituk.pdf
    • https://hankilfood.com/upfile/files/55420822287.pdf
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/1s2lb5jaduh64ls834q4rucfpu/40966232024.pdf
    • http://bjbtrh.com/files/pic/file/90484096995.pdf
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/07d471b9cc59c3baa8de96e04fe226f5/nebox.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_off0000d0fd.bin
05a7be41ff3f0b12eb980adedbe963e7c66900826156a3e21dbea73c673c58ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FD 11324 bytes
font_01_sfnt_off0000eb33.bin
c9a5099378d3b7369a53efea7862cc67b3cc8b53671e447b249b699f918049c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB33 16532 bytes
font_02_sfnt_off000115e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x115E6 16792 bytes