Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a7884908d66668…

MALICIOUS

PDF

84.2 KB Created: 2021-09-03 22:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: db6a06668e3eee75651b57f4f3feec8a SHA-1: 2d54a5a60add21a0b25e909b723fe71e78f533dc SHA-256: d2a7884908d66668e20bb1db24bba508aed0094238fded9cf88f9988f9141d22
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains a link farm pointing to compromised WordPress sites, suggesting it's part of a phishing or malware distribution campaign. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a technique used to evade security filters. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to facilitate the download of a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/971b7458ab347b8d44bee8643f5255d6/zazozavis.pdf In PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c67514ca9a7---17404716545.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/sesajegorefaxijulasosi.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/dbf4c23e9059b50524c1c99a9585d55d/bugokuweroxo.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/53112269189.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160e66766724be---tozajuwixega.pdfIn PDF document text
    • https://kclandscapes.com/ckfinder/triplebuserfiles/file/nuzutizonenub.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/b651686f0ba3aa98ed1533c719840831/12280917177.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/79804707998.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/1927000908.pdfIn PDF document text
    • http://jucal.es/images/file/jidepupanizoz.pdfIn PDF document text
    • http://studioindelicato.com/userfiles/files/50497216178.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/jipij.pdfIn PDF document text
    • https://gruppopolidori.com/upload/image/file/94486085827.pdfIn PDF document text
    • https://dananeye.com/uploads/files/202108150821458948.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/81738696026.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/2bddead6908205f8f05466ecbc69f6aa/sufeju.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/16494301222.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///takivexeka.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/korub.pdfIn PDF document text
    • http://szm.hu/userfiles/file/63936586693.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/fezugopaxudapuxo.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/15000753477.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c1e74efb4---vated.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cfc33cbc447---lamiwej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=configure+outlook+2007+office+365+manuallyPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f71a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71A 18596 bytes
SHA-256: 1bad23010c3b5d2d8158ed9de6838bbf7076618e6a8926b0f38fc192dd63553d
font_02_sfnt_off0001273a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273A 11616 bytes
SHA-256: 32673e50cf3a9a4ab6dfae229b572e73bf06a2c81fd0cedf6623867db513d027

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