Malicious PDF — malware analysis report

Static analysis result for SHA-256 7faf7df2d29de237…

MALICIOUS

PDF

92.2 KB Created: 2021-07-01 22:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d857359c305b199da926ab47fa68e132 SHA-1: f72b47ab9f022dd7cfd4b7abd8f08ea0b56d20c1 SHA-256: 7faf7df2d29de237ea417f4e051ed4029bb92710bbbcfa85fb834b4a06b6d49c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised CMS upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the structure and URL targets are indicative of a malicious PDF designed to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/e818ceccebbf639701718584e0f1218f/bidunulivomufaji.pdf
    • http://smartraoptics.com/fck_filemanager_upload/file/2876197236.pdf
    • https://mttrasportisrl.it/dati/upload/file/sulinipozizakasokozek.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/e7g1jkjh9a3n8198iitlpr10n5/bajit.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607adf8ac113f---dagirowimisuredalafigep.pdf
    • http://www.anjhimayath.com/upload/file/865271674.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec227ed7e8---82260835872.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4096c59fc6---kiwexevevo.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607db9c292720---85247170589.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad06ab79ea---sotama.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b409d8f00---91617291128.pdf
    • https://aldapa.eus/files/galeria/files/zopofub.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfdfdeb33d---48228960843.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b740325f62c---jesivorabepinakanunik.pdf
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/27684215818.pdf
    • http://sungsam.net/userData/board/file/38530443327.pdf
    • http://gemculture.com/userfiles/file/45221975772.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16071efd5dec51---63927823163.pdf
    • http://fructusartis.com/i/File/24214496792.pdf
    • https://arnetbilgisayar.com/upload/ckfinder/files/17924222182.pdf
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/kaludeduminavebitoxekafo.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/3ee95b29d0a63ac783f2a53a03031c39/5318939083.pdf
    • http://jjmcp.jp/userfiles/Image/file/99099364731.pdf
    • http://ctyrkolky-gamax.cz/data/dokumenty/morilukeletegovojadigute.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/6dd5bf175f6c45db490acd8debefd179/guxogag.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=what+is+it+called+when+a+solid+changes+into+a+gas
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec67.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC67 16792 bytes
font_01_sfnt_off00010479.bin
3cc28743a0260aebc3e743ea9ba4a4f1713e15cee082a46c92c0ff798805e1fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x10479 18768 bytes
font_02_sfnt_off000134b9.bin
61e263d85bc490c8f612560734c17cd0723d8fb793f817635e92ac4f94e13360
pdf-font-stream PDF embedded font (sfnt) at offset 0x134B9 10628 bytes
font_03_sfnt_off00014cd4.bin
1cfb00680a8a18ef5d5af493cc5b57cfe410abeba37087ee2ecd799c98b61e68
pdf-font-stream PDF embedded font (sfnt) at offset 0x14CD4 16168 bytes