Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2acea95e8dfb5dc…

MALICIOUS

PDF

82.4 KB Created: 2021-08-04 08:33:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: dbdac09b83065eb72d2a5b5836dcbad1 SHA-1: 4ef24e8c0069f576aaf263fe066ef495415229a0 SHA-256: b2acea95e8dfb5dc2b4c0dc398295572c64050666b1712525bb136155d958b29
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. The primary purpose appears to be redirecting users to malicious sites, likely for phishing or malware delivery, aligning with the characteristics of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://coonvalleycc.com/userfiles/file/lojez.pdf In PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd35782677e---71892101284.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a10b5818072---26712614148.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/fezupegudor.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/29a861f93f70054b55694aa70da14007/12208331354.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/20098664268.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/02c55576e53c941652f114b1360a1662/tiwunojufanomunokok.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/gisejikosuvepawefol.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16080a42318ab9---wogimamumaxal.pdfIn PDF document text
    • https://ismart99.net/upload/files/36453636997.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/b44f73d05dacf6668206f7aa6179e658/lilosisilo.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/95032633104.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/87ef716e927019b455c14d0e8095aeef/9694387700.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/71034529677.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/16711682873.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/8a38bf86b9a3b7b498f46965a95236ad/95815248385.pdfIn PDF document text
    • http://hillandbrownfamily.com/clients/76964/File/pijiwisubatasadadamuw.pdfIn PDF document text
    • http://garderoba.sk/images/_file/sodeboxadepujumijuru.pdfIn PDF document text
    • https://stradatextiles.com/upload/ckfinder/files/zezofamanitop.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b68363e17---61921182187.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/23419953832.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/kazezozat.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4358c001f1---zavunimixuvilazoda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=coordinate+graphing+worksheets+for+7th+gradePDF 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_off0000dd28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD28 10988 bytes
SHA-256: 616f8185ba4f0870d52eb650f6f07ae3d13d7a696e11ac9f312549155e741fb6
font_01_sfnt_off0000f68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68D 16556 bytes
SHA-256: 1f63321e714dfea7be019bf0f1c4360143cd506a03a1cef672a985edce0a8a89
font_02_sfnt_off00012181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12181 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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