Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb247a2de9d104e…

MALICIOUS

PDF

79.4 KB Created: 2021-09-17 17:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 41f68185479535fc54470563989c3111 SHA-1: 7011a53cc0499ec4b0ea646243260851d504e60d SHA-256: 9eb247a2de9d104eeca30c63114a4103735edd34a45396a8e1ea8d5aa4a83bf6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URLs, many of which point to compromised websites or disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • 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.
  • 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=app+to+open+mobi+files+on+android PDF link annotation
    • https://koltoztetes-szallitas-lomtalanitas.excore.hu/ckfinder/userfiles/files/nalusazeloludozipezarediv.pdfIn PDF document text
    • http://punaide.com/userfiles/files/jiwiwez.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/ce12b9760bc86dbd8551c46f26c28db2/87627263329.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/7004274600.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/miwevepot.pdfIn PDF document text
    • http://chithanhplastics.com/uploads/userfiles/file/18206262529.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/98002047186.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/jonitupinu.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/12594296749.pdfIn PDF document text
    • http://dakdekkersindex.nl/images/uploads/35472399368.pdfIn PDF document text
    • https://leresto-niort.fr/images/userfiles/files/29484552079.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/rituvonaganofa.pdfIn PDF document text
    • http://albarossa.jp/js/upload/files/razuduviwusasizitoz.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135dc6f2ee95---17148229731.pdfIn PDF document text
    • http://intranet.uts.edu.co/portal/app/ckfinder/userfiles/files/punulivew.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/adrslrc37u7vd73e1lfac2uqls/ribejinivuwiwajuse.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142b2f34572d---90900200080.pdfIn PDF document text
    • https://tjp2-hotlink-j3t.com/contents/files/zopezi.pdfIn PDF document text
    • https://digireg.lu/upload/32884808368.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613e8415ae8f6---sejiragidiwatamiwomomu.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/25964933972.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/wabirizonanij.pdfIn PDF document text
    • https://www.tcf.gov.tr/ckfinder/userfiles/files/45070429300.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_off0000d297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD297 10780 bytes
SHA-256: 30aa9bf07e8f6edac78786b665ea8251d9dc0fc4728d5c4008261f9bb8919bd0
font_01_sfnt_off0000eb25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB25 17120 bytes
SHA-256: 1b41d86deecaafef63328db82eaca126afa3d1a75572455342fe450fc99bf2f1
font_02_sfnt_off0001179e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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