Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee886dd5d6214097…

MALICIOUS

PDF

85.9 KB Created: 2021-09-07 05:35:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3caf6530d56e55538235ae1c5db35de6 SHA-1: 5be5d631b86371a886fbf334373b41a5ff171447 SHA-256: ee886dd5d6214097ee75d62c97aa91f228c1b98d509fb10ffaa0d32dea3059fe
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to potentially compromised websites or disposable hosting, likely to lure users into downloading further malware or engaging in phishing activities. The presence of external URI heuristics and link farm indicators strongly suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 http://zhongjiukeji.com/upload_fck/file/2021-8-25/20210825115534860475.pdf In PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/kerudonapeloza.pdfIn PDF document text
    • http://jwnorthclassof70reunion.com/clients/c/c6/c6167e942b76adab5863fbee8ae727a7/File/nexorevufofokut.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/xozewopugimemelur.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/rovelivunidavipupakola.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/fc1e355bf51039c186bafafd13c1a9b5/27084366201.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cd6081b7290---senekeluwetakesibi.pdfIn PDF document text
    • http://funkyspa.net/ckfinder/userfiles/files/87809473028.pdfIn PDF document text
    • https://eledigitalpr.it/allegati/file/5291751019.pdfIn PDF document text
    • https://ibextrail.com/editor-images/32746683455.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/e38f0aa5fccedc009673a842951523b2/niwizixukavowafo.pdfIn PDF document text
    • https://starbox.fr/img/files/12149029547.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/85219744210.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/b661c83c653a2b1fd17fda57350edd91/bibukuxasofuzew.pdfIn PDF document text
    • http://xaydungphongphu.com/uploads/files/wumotuxalilevimajod.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/zojexededowazegapewogiket.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/19820436242.pdfIn PDF document text
    • https://daks-96.com/f/uploads/files/sepijifonesubiduk.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607593da79a9b---12886738573.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/pebepikefojudetokemame.pdfIn PDF document text
    • https://davaocarrental.com/images/file/wegobozazaribimefa.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834f4cd265a---zudulobax.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/dejixelepoja.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088d8c960a8e---reronojonate.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=std+12th+commerce+account+book+pdf+in+englishPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC25 11648 bytes
SHA-256: 99c4164a0fec8b929b8d93528026fca5ff6bc19b5ac1439c088b1f24b51b6f0a
font_01_sfnt_off0000e752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE752 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF64 17832 bytes
SHA-256: 3dca8feb11b2f44ea73294b824e24740eb7ba56f926f2bcac250eb3fab1ed9f7
font_03_sfnt_off00012d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D56 17792 bytes
SHA-256: 479c608e1d2eea6ce6df26dce75b91cb644ca526492ed4a11c8f51ee691bc2da

Open this report in the interactive analyzer, or submit your own file for analysis.