Malicious PDF — malware analysis report

Static analysis result for SHA-256 9810c6d26070ba07…

MALICIOUS

PDF

72.2 KB Created: 2021-09-27 00:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 82bafc3fabe0627758408cd8cbd3dfd4 SHA-1: f59e44320552065a34195fa0c47e3a5d10151094 SHA-256: 9810c6d26070ba076eb4771a2c787b1de397f3314cef614a25e24e2aaaf91aad
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to suspicious domains, and is identified as a link farm, suggesting an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly indicate it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://irina-beha.com/ckfinder/userfiles/files/kavuvebexunumikeku.pdf In PDF document text
    • http://mfo-fond.ru/ckeditor/ckfinder/userfiles/Images/files/63462251147.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/60878075184.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/mizikumaxi.pdfIn PDF document text
    • https://losaltos.com/wysiwygfiles/file/1692202180.pdfIn PDF document text
    • https://chilegastronomia.cl/uploads/userfiles/files/79336638251.pdfIn PDF document text
    • https://kermiradiatoriai.lt/images/files/nilavete.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/49904696808.pdfIn PDF document text
    • http://ig-einheitsloks.de/medien/file/bowidu.pdfIn PDF document text
    • http://ccadl.com/files/20210912050050.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/n9ipohrqs1es36i4s8739jtv0e/85347757745.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/83239186832.pdfIn PDF document text
    • https://digireg.dk/upload/doxulejez.pdfIn PDF document text
    • https://seerupit.dk/assens/file/32790235992.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/918ebf630b493bd0b8c5dd67a180bc1a/70916983356.pdfIn PDF document text
    • http://air-ned.com/uploads/files/gebikabezemajugepulorade.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/91080863402.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/rimakuposamiza.pdfIn PDF document text
    • http://haki.vn/uploads/files/7555785135.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/sojugoronavel.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/zizafuvavifazu.pdfIn PDF document text
    • https://reitinguok.lt/userfiles/file/84730288795.pdfIn PDF document text
    • https://luatsubienhoa.com/upload/ck/files/16513849649.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/42360815947.pdfIn PDF document text
    • http://wieswioska.pl/userfiles/file/sisisibibukofibedemexev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=word+power+made+easy+pdf+download+for+freePDF 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_off0000b31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB31F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB36 10664 bytes
SHA-256: 0166bd0314ce4a9c879e0f8a98d453be07b365ca2e59aa12ec35aabe7d2b1f53
font_02_sfnt_off0000e3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B2 17980 bytes
SHA-256: 65a2ec3c937dfa5d16ec76fe02950034019742858ea73ef4fd312a902bec26fd

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