Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9da71d8ee6af693…

MALICIOUS

PDF

84.4 KB Created: 2021-06-27 12:37:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 48640edc248892b6ee354506ddbaa4dc SHA-1: b1bb5327da2ed75b9149f32c1c6c003fd121c97b SHA-256: d9da71d8ee6af6932041c28f52c10189bef3cd782c291c53660f1ddad4b83903
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://richmore.kr/uploadfile/fckeditor/file/dilepulole.pdf In PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c988b72e---4469376683.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c27e0252f34---jidolijegisonazubifiwido.pdfIn PDF document text
    • http://riversedgefm.com/files/file/watatovu.pdfIn PDF document text
    • http://zae.me/datafiles/file/mogafugowapifanasarutexap.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608288c0ac955---zimoluzetedobawimibufuvo.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/84591858940.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae16696e37a---56147959415.pdfIn PDF document text
    • https://emmaushuis.org/pages/babamudateni.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/selotud.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/dc6ce02b63b2947c2ef53fd61111f2d1/kidixezurufopezizi.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a2b26731c---fofupojowowawemetapug.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/susasu.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795f2bd4b55---malimepufidufekajamojuz.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5fc4085ba2ef76637c3deee4259e6392/76658585586.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/bewedasuronodekokixosafuf.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/11c462732262d66699821fdeffe7eb5e/64511426101.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/fdd762390b952e20f679142dcd8bd7f2/sesosume.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/bd123d97c8190e18b73c653e028fb3f4/17190353031.pdfIn PDF document text
    • http://hungthanhauto.com/luutru/files/rozulafuwasewatogu.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/66412837545.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=the+worlds+easyest+game+answersPDF 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_off0000e5be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BE 17084 bytes
SHA-256: 0b52d6a2794e9d39a5af96c592b6d01c808343f6b7843f1123d13f4754198c8b
font_01_sfnt_off00011266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11266 10764 bytes
SHA-256: 778a47fbb49f7e50bfdf0a48460e7bcb76ca23835a947f5796ec19dc1c583f71
font_02_sfnt_off00012aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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