Malicious PDF — malware analysis report

Static analysis result for SHA-256 05b62acd5d9c3a14…

MALICIOUS

PDF

97.8 KB Created: 2021-07-04 23:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 56d7f0a699a761926d4a6e45247e1d91 SHA-1: a9819530e79e8bf7355316dd4ccc5d87d2ff3129 SHA-256: 05b62acd5d9c3a14e4ead20c56b16e60b8b41dffed046be11d47969947f15a39
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The document contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a likely attempt to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/jl7ibva87bueifteol78a3flh1/fotewezigup.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608422ca977b0---24933655238.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/be68f8a0d87ea9b6e68d81ad5eff96fb/zoxoteduv.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/e79d14267499dd4c3e4a3f4d7c535da1/80251983406.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be0be9e4a82---rakojubiverazowepaxi.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763ad46037f---95928953051.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/9f20fdea0a5976bf17ffb54625efae37/pegelarotumuleti.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a61657b4bec---verulekofabonugugepad.pdf
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/jinbjt70k9rt1h2d8uot8rnkdf/16183680227.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1e1e61607---fonitedufegiludu.pdf
    • http://agriturismocorteerbatici.it/userfiles/files/topatufix.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/799s3tcngglb5vjaum45sbkli6/rawilo.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/ridrgaq2ebork3rs2vmjl60m43/jofogavonimagonivufi.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e21a3696e20---xuwuzoxosojugaf.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/b22584832d560f7dcdc807f39d4ee04f/39479321545.pdf
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/14296921607.pdf
    • https://psystat.net/candyticket/uploads/page_images/files/nowovudumurinapitibos.pdf
    • http://apluskleaning.com/admin/images/file/kuxifi.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/phm67e24bhr40l6rrvi7okqtbp/48678237937.pdf
    • http://sns-russia.ru/userfiles/file/zelijudefe.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608421f74beb7---gawum.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/gmc9i631dtnod3snlg1a8og23d/41228747023.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f40b93ebc---dotoledaseduduberonetis.pdf
    • http://arabic.cz/ckfinder/userfiles/files/zukefigovolidozikul.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=hotel+booking+android+app+source+code+free
    • 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_off00011b59.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B59 16792 bytes
font_01_sfnt_off0001336b.bin
e2895f567b68680457424900c3e18dd50cc3a301da5df29c68a65fed61cc3656		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1336B 17084 bytes
font_02_sfnt_off00016004.bin
e50cb005f64696123f49f841563ecd84d68a2c302dc400926fd44deed377848d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16004 11120 bytes

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