Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa0bed4bd7cf16b…

MALICIOUS

PDF

86.7 KB Created: 2021-07-09 15:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4ef76ca7e1321f84d5d9f237ba351749 SHA-1: 322a3c2de3b8af9dfd8fdd7259a877ac5074e683 SHA-256: 5fa0bed4bd7cf16beec623deceb11b437ab236be4305f5bce53003bbfcd3f3d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics suggest this document is intended to lead users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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://greenplanetnepal.com/userfiles/file/navazegasateveniribositez.pdf
    • http://momsystem.ru/public/file/12308289196.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/044625234ddf48bd3c6e012cff5f740f/53112765015.pdf
    • http://angelescare.com/userfiles/file/fopimipelazezenipuxot.pdf
    • http://7tec.ru/userfiles/files/49649930745.pdf
    • http://mtsskzy.com/userfiles/file/tofojinanogowunaruledex.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/b78d854214232bd1f4c45f088d163941/rofodelikasajemomi.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ce14ba4b9---93578912590.pdf
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jasobese.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/c0e558b93780bbb87b4ddb5cbe3ef96e/58495169683.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/68b0a78ede7ee72606ac5ffc23ebc094/dononopagaforupukotawewen.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/fd614582129fd4b5d84650590ec8a646/89578879838.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e76ff1a9ad4---finezujosuzaridig.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c188b5ec3---riveparuruwavixodonof.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9f18512a7---80375714775.pdf
    • http://hani-bee.com/userfiles/files/galibovodorepotisepo.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d83e1029d---dojeduwavojofutuf.pdf
    • https://service-panev.com/userfiles/63992347249.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/2so5042l6bfol1l95cdevlbh70/76750897943.pdf
    • http://bona-agra.pl/Upload/file/28053158565.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/f48d4a0d852aae9fed2b49f79fe84431/papej.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608097f40078d---44248634111.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607882873880f---wasogolekexidajelorixod.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/faad66704d18c63ba0ba4886f20147ee/vonikemoma.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=and+the+hapless+soldiers+sigh
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c95e1520c---nunorowotazomov.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_off0000f050.bin
cf1d1de7c222783d1566e0315f70984d2551d0b0d22dde9b62ef5fcb5cbfe958
pdf-font-stream PDF embedded font (sfnt) at offset 0xF050 17344 bytes
font_01_sfnt_off00011d2a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2A 16792 bytes
font_02_sfnt_off00013541.bin
8b5a8efb43a29bcd0915ad11102a2da59806d5afde9b7380bbd853eef7148ece
pdf-font-stream PDF embedded font (sfnt) at offset 0x13541 10652 bytes