Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b730a3d2a30dd5…

MALICIOUS

PDF

84.0 KB Created: 2021-06-26 21:20:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cf31569d31d7a8a8d4834d3e90eec3af SHA-1: 19db1f28a5cba0c341b840e941b708a21795e91b SHA-256: a3b730a3d2a30dd55bb9ffbbc2a20f42ea1d64d6e440b662764dac7e6174d0c3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as a malicious PDF by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to distribute malicious content or phish users. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates a fraudulent scheme involving prizes or parcels.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d13c55bcab---5029850981.pdf
    • https://xn--z4qq44i.tw/upload/actfiles/moduxoruxefelefovuzizi.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/91b91fac7b0bd0c9982598692b42ff68/41700701734.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfb52d0074---86635125630.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a501e54c53e---45295921855.pdf
    • http://africanhairbraidingsalon.com/userfiles/file/5045655237.pdf
    • http://simkoongschool.com/uploads/editer/files/68964204294.pdf
    • https://denizlihorozu.com/resimler/files/tosimodokixumeka.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/a5979dccbcd757a852d642905b4b6401/16135166539.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/69df46e256b7265439342532a715fa44/16143978223.pdf
    • https://consultingexpert.eu/fckeditor/userfiles/file/54279611317.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/293b63da878efde748b6fd544e916659/41776837024.pdf
    • http://hrt-foto.hu/_user/file/mufuxaxiduwi.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607885f89a017---15301121886.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/09a31090dca77b273fc05a0c1e21ba61/63276287355.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160805310df779---39442388073.pdf
    • http://blbr365.com/userfiles/file/1620651063.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/1a3a773a4814f8d3fcf0994c8ae5460a/todujumebuparefopaluvup.pdf
    • http://synowka.pl/galeria/file/51332654719.pdf
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/614a84f809f54e66ee34643229425dc5/13479375386.pdf
    • http://scro.ru/pic/file/89294749664.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=the+legend+of+bagger+vance
    • 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_off0000e26a.bin
c15d096bdc3a3b3e05e7fc25a985cd64308c23751336d1432d69c744c16f8d92
pdf-font-stream PDF embedded font (sfnt) at offset 0xE26A 10568 bytes
font_01_sfnt_off0000fa46.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA46 16792 bytes
font_02_sfnt_off00011258.bin
c02eb32ae6ef6181b58945c8fbef3fb89c25447c4e434dd57f746f1c1a2f4a19
pdf-font-stream PDF embedded font (sfnt) at offset 0x11258 18680 bytes