Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47002f8417a9d0f…

MALICIOUS

PDF

81.3 KB Created: 2021-09-14 13:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1d10b6e69b067e30b8b24b40b320e6da SHA-1: caa5db593414112bca85cf36d446c54142013a37 SHA-256: e47002f8417a9d0f8202a0dbfb1568f4a0aa3d182dcece2106a43bef79daaedd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains multiple links to compromised or disposable hosting sites, suggesting a link farm designed to redirect users. The presence of these links and the overall detection profile strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://www.vignolaweb.it/ckfinder/userfiles/files/83956799770.pdf In PDF document text
    • https://msiutilities.net/documents/nanodiwugetosag.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/sareluxesuzuwe.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/vepemara.pdfIn PDF document text
    • http://lizhechem.com/upload/files/25300083265.pdfIn PDF document text
    • https://www.pollackmihalyiskola.hu/ckfinder/userfiles/files/mekokoputesovad.pdfIn PDF document text
    • http://showpelec.com/data/file/20210905_092243_812.pdfIn PDF document text
    • http://sushiyaslo.com/uploads/files/xagosedosuse.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/17502285827.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf00d9f002---98888391034.pdfIn PDF document text
    • https://invest.pl/userfiles/file/42239095802.pdfIn PDF document text
    • https://majubesar.org/contents/files/wofodenigawotuxopajot.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/cc24ffac9d199626e0a2c7bf199ee8a8/pajutesutavula.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/wazabakemage.pdfIn PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/89652120382.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7ba3a204b---34605724166.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/bofoko.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/mafoweben.pdfIn PDF document text
    • http://medtravel.pro/images/hand_uploaded/files/rojemigonepezuwerega.pdfIn PDF document text
    • https://forumhrdbekasi.com/webroot/userfiles/files/kefaj.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/30312448025.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613520df3355c---nazilurudurekeninav.pdfIn PDF document text
    • http://designerhouse.ru/upload/files/wopewazonalil.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021091218052818.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=mario+free+unblockedPDF 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_off0000d8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DB 18692 bytes
SHA-256: b29bac8cd145b1e40b59bbd2bf86fd8349e02982fde2ed10c33ec5f4e30c3133
font_01_sfnt_off000107cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE2 10528 bytes
SHA-256: 82c0c86c0cdc49d0a643b3737a6c85b41ed6de3d6329b417495777c0a85740ef

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