Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe9be0a058ada033…

MALICIOUS

PDF

84.8 KB Created: 2021-09-12 09:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ae99189040d4c3b30940c7c05d06e97e SHA-1: ec123bd1c3aa94c84d90c0ab0ce0bcf46f025a22 SHA-256: fe9be0a058ada033f9e45486672600a9a9802bbcd3a916dbc6f1177695bc6c79
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The high number of external URIs, many hosted on disposable domains, strongly suggests a link farm or phishing lure. ClamAV detection and ML classification confirm the malicious nature, pointing towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://philabc.ru/uplcv?utm_term=fast+way+to+transfer+files+from+android+to+android PDF link annotation
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nalubi.pdfIn PDF document text
    • https://htcpost.vn/vietpost.vn/img_content/file/jumoguwepired.pdfIn PDF document text
    • http://chinhsuasolieu.com/media/files/bozorivirapimitides.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/tomogetaluxapunid.pdfIn PDF document text
    • http://dermatologomiguelgallego.com/miguel/fck/file/26941708044.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/f6k5kal28n8jqtlfuutcshtapg/53137670894.pdfIn PDF document text
    • http://nzozkrowodrza.pl/uploads/editor/file/80789491425.pdfIn PDF document text
    • https://eyescare.vn/app/webroot/upload/ckfinder/files/wodewalojuvira.pdfIn PDF document text
    • http://fuhua.tumujike.com/assets/upload/files/202109032253352096.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/76058808645.pdfIn PDF document text
    • https://uat-tunisia.com/userfiles/file/16675673505.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16138868339f63---wozizukilexovijumu.pdfIn PDF document text
    • http://wellfoto.cz/pictures/files/vozifefir.pdfIn PDF document text
    • http://carscaso.com/js/upload/files/xurodefovipalivobobidi.pdfIn PDF document text
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/budukabidudesutozaloked.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9b8cb8b90---sufim.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/wezibamajil.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/89077788139.pdfIn PDF document text
    • https://arnetbilgisayar.com/upload/ckfinder/files/didosewuvekojidikovikavox.pdfIn PDF document text
    • http://tidomusica.com/uploads/files/202109121016147290.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/37595030093.pdfIn PDF document text
    • http://wsm.hk/images/files/zawiwadovig.pdfIn PDF document text
    • http://baharev76.ru/userfiles/file/dokevozoriganegevome.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/xegetevepidaruzamugezuzo.pdfIn PDF document text
    • https://5ky13lu3-1251.com/contents/files/89402975363.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/midejawororan.pdfIn PDF document text
    • http://liceoadultos.juniorcollege.cl/userfiles/files/nirunawimi.pdfIn PDF document text
    • 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_off0000e1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0F 19496 bytes
SHA-256: 47322b747ede2cf8f68d4e6f5582e8141cb5d61495b530fada7a532a7cc00fd0
font_02_sfnt_off00012c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C0C 10692 bytes
SHA-256: 5d10efbb1167cd00f439f8352ffdac416dfbc124738552fdd94e86f7ab6555f7

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