Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e94e2c20def321…

MALICIOUS

PDF

74.7 KB Created: 2021-09-08 01:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d0384ee732511ce0b9b5f8de08463de3 SHA-1: fb4e2884aff3a53279dfd1e7913157acc8d8e265 SHA-256: e2e94e2c20def321a893590cca55ba00c8d00728eaf99e11eb07be1d4875b506
164 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to potentially compromised websites hosting further PDF files, likely as part of a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/868dd4af9b0702f6b055909488b1b163/jebiruboverabaritupedek.pdf In PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/lexazobututaperalemerise.pdfIn PDF document text
    • https://digireg.at/upload/vafezipupufulajudom.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/82657227028.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/tunorokejaletiwezazu.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/tazekifar.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/70879815039.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c89c3d386---56637894491.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/s7qj01ipds73ct9a9g1db1v8n7/99154215695.pdfIn PDF document text
    • http://chromoink.com/updates/file/givufelaxakujazus.pdfIn PDF document text
    • http://foxhill101.com/userimages/tatenejajudepijef.pdfIn PDF document text
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b18e52bb80b---posiviranogusodigatofag.pdfIn PDF document text
    • http://chinalabware.ru/d/files/3301689563.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210707_E1E479A0C167A69A.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f52282bfd2c---loroluwevogix.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/nitedoverijeroz.pdfIn PDF document text
    • http://jucal.es/images/file/31754015064.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021072218014473499.pdfIn PDF document text
    • http://flatadministration.com/uploades/fckeditorfile/varotusepevupigu.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/wizedulutinuvuma.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/fapekuzuresoviso.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/mugufur.pdfIn PDF document text
    • http://bakineshr.az/ckfinder/userfiles/files/lapukov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=pdf+export+commentsPDF 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_off0000c0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D9 17032 bytes
SHA-256: 621b477197f1d9c9366dc0a81c4a326a0ad0bed69283f5846bbdd1b79044b526
font_01_sfnt_off0000ed02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED02 10584 bytes
SHA-256: 0004e229601767706693ab36d777b378dbd5aaffd6ebb66e866ec65b80b9c6e0
font_02_sfnt_off00010532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10532 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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