Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb45c6f2ba6ff4c0…

MALICIOUS

PDF

80.1 KB Created: 2021-09-13 05:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 347dd0fcd50e4fcafedb067d2b6645b7 SHA-1: e9682fdf258f6767cf3a3d7e9bc9463585ac6dd4 SHA-256: bb45c6f2ba6ff4c010194c18b86707edfd73f6bb331053112f38539dae7c4a27
164 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 within documents. It also features a link farm pointing to numerous external URLs, many hosted on compromised or disposable domains, suggesting an attempt to distribute phishing content or further malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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
  • 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://irlanc.ru/uplcv?utm_term=daag+old+movie+online
    • http://s13cf5ef.alojamientovirtual.com/ropalaboralbarata.com/userfiles/file/45253957587.pdf
    • https://dabanbep.tanglehadong.com/upload/files/2049286094.pdf
    • https://cursosadistanciayonline.com/medios/files/vutabilaz.pdf
    • http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/xabezoresutiporakekoviwaf.pdf
    • http://educasters.co/ckfinder/userfiles/files/5663095353.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/1031d4e14de28e9c20168dd2cc2917fa/gafiguvisimo.pdf
    • http://ud2-140.com/files/vabepixebifutonazamaxod.pdf
    • http://langmypham.com/luutru/files/fadewajepaluvezukazozo.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/7b73bedca3d6c4ee6e7fe424bfd787ad/bepibisumazedirewukoriri.pdf
    • http://dakhoanhanai.com/images/files/durig.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3afba7e20---zitedobakewepuz.pdf
    • https://millersexpress.com/userfiles/file/84159584469.pdf
    • http://tipkeo.com/js/ckfinder/userfiles/files/tonodebizad.pdf
    • https://phm.vn/upload/files/vabutemuju.pdf
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/vosiwoweze.pdf
    • http://bubb.cn/up_file/file/24711647517.pdf
    • http://maslatalaia.com/userfiles/file/sebilisegibijixan.pdf
    • http://merwepizza.com/upload/file/50732629324.pdf
    • http://ncfc.com.tr/ckfinder/userfiles/files/larirojarimoragodol.pdf
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/75977882673.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2d7de987c---xujugozeputitapunukukoto.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16131cf859308d---latulexebijofikimurilaren.pdf
    • https://rafautama.com/uploads/file/87522475751.pdf
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50814822549.pdf
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/ramosesedorag.pdf
    • https://perfecthospitals.org/ckfinder/userfiles/files/39249901026.pdf
    • https://2ruoteexpo.it/ckfinder/userfiles/files/nawufilowefule.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d830.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD830 16792 bytes
font_01_sfnt_off0000f042.bin
9fa6b98820e89fb31f2a340bab921daa963501dca89c8b3064bd7be1f83837fd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF042 17188 bytes
font_02_sfnt_off00011c38.bin
8373d88ffb2e962dfdb266f3a45410a755114bccba496b92f7fa34ab73e8818f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C38 10292 bytes