Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2080346ffc05ec…

MALICIOUS

PDF

76.3 KB Created: 2021-07-29 11:18:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7d105fd4b3ffc07793c68253f36f60a3 SHA-1: 3a1a2cca7fc4f8d538c08f8711c9472b8cc99c09 SHA-256: 5e2080346ffc05ecadff59f4c4893713b903e6892147af6f29b413880238d666
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. The file's structure and URL patterns are consistent with a link farm used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/70eb9656590b2c995a7c977da4e96e0a/gulemunoxu.pdf In PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/d7cefe1841976a298313db1852a13e28/21742191947.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16073e885bc9bc---31037725839.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/5b24344db8a8b8d3632e94f4990eae85/61624132024.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/vidikuxuviziw.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/zagisekivukudoxesora.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d84a49d331a---41195170135.pdfIn PDF document text
    • http://arslanemlak.com/E/file/dusigawofinovovowexalo.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/94377042756.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/627bc08af1ca83cc1529dd6c4220152d/18411714289.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/5b516fb1317ff6e59aebc041c51d24e2/26102827316.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757975448ab---tobekigevofir.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/58412346926.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c671b6a7d---fajijupebijiwixa.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/wulov.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/ae8uloqol22467gq35i0phus5k/83099489718.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/zugozafafazonof.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096880335ba0---5167905976.pdfIn PDF document text
    • https://traffictkt.com/viking1/uploads/files/25846907440.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a03e8e0b7---metafofodivugugopod.pdfIn PDF document text
    • https://mmoxx.mn/userfiles/files/jabaz.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/66500567264.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/lotunodasejotanu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=oh+lord+my+rock+and+my+redeemer+sheet+musicPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC491 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA3 16568 bytes
SHA-256: bd2a97e172c9785e52bef435e5a9a95df2d90937a9886da2e1666915a94471dc
font_02_sfnt_off000107ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BA 10964 bytes
SHA-256: cd8c6d90473a743bb1fb1584841b5e3193b0c7f9436592e92aedd985d96b7c4e

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