Malicious PDF — malware analysis report

Static analysis result for SHA-256 061e08e220fb7bed…

MALICIOUS

PDF

86.8 KB Created: 2021-07-21 22:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d2cd4c43fb4180e993808852b554a0c2 SHA-1: 5332536c21bea11f4ac8789f0e2d50304139a264 SHA-256: 061e08e220fb7bedc4171321a3006189a9632f5380f4dbdc55cd11656694c8eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous URLs, many of which point to compromised CMS upload directories or are hosted on disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bhk-aindling.com/userfiles/files/11874868040.pdf In PDF document text
    • http://thunderstar.cn/userfiles/file/20210506184513653381925.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/64tb23fjs7ohjbpe272dlkc1u2/lewiwu.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210606052036516.pdfIn PDF document text
    • http://project-st.ru/userfiles/file/9915306284.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/17ff97f1d8515c04c9bacda06d7a8787/38728382523.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/2ef67b526964d95f705a9256c7bec98e/manajimawumetubali.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081afdb821c9---limutu.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a676fd14a0c---tevezat.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/d8f24300d7970856d5054ce69356b3f7/65033187737.pdfIn PDF document text
    • https://keluargamimpi2.com/contents//files/nerozoxagarupo.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/690d78e52a7c60f5784da8e1afc4ce87/lofemukexisefixo.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/xalapuxazodijar.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/5920cdb395a635707102d5e0306bf574/lulijifipitokiwebinelu.pdfIn PDF document text
    • https://ahha.az/userfiles/file/66077672797.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/17437785646.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/tosizabodajafo.pdfIn PDF document text
    • http://intersonik.eu/upload/files/12957415139.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/7f28d4f7d570ccb3f8400e002df1170c/fewemufibebebaxerodupov.pdfIn PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/jilikapatexadavo.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be942046bf3---jevafojulaj.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/2035235623.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/6bbacd04a5ee30bc71a9b62193690d41/fobikujered.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/liviwojig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=reach+truck+theory+test+questions+and+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_off0000ef56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10768 16828 bytes
SHA-256: e52be413046a7450f9c84cd0decb662bae22c27e66b6fa98b8f2e74bd26dc03d
font_02_sfnt_off000132ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132FF 11004 bytes
SHA-256: 6516c98ed0986bf2fa5c099c8dce10950175f4a76e06972f18bb4f49dd4099dd

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