Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ccb2222f4492c29…

MALICIOUS

PDF

82.8 KB Created: 2021-09-01 03:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: db79878d41f9a7d64b5e0de339422fe9 SHA-1: 330601c95561827e972dd48ad88466284043a01a SHA-256: 5ccb2222f4492c299e5ca597d8a0eb5dd2a1d33ddd2d1210ec4c744618c0e514
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a phishing or malware distribution scheme. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 http://davidhammerstein.org/userfiles/file/78693530770.pdf In PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/59742312591.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/pdmelvh98cf8k25pdho4jgcmf1/83689120107.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/24803625561.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/8a84b290bf95a62c6f36aba7831bbf6a/29388080111.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/2c89d57308e50ace2df42af79d08cb7d/68489224771.pdfIn PDF document text
    • http://altinay-law.com/images/file/79505679669.pdfIn PDF document text
    • http://oticonshop.com/ckfinder/userfiles/files/lidexowelinefupuba.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/1c9f7a32fdfca32476658e04a85f7fb9/paramumafapexuvewoko.pdfIn PDF document text
    • https://mangmalungtea.com/userfiles/file/bafilewujitaros.pdfIn PDF document text
    • http://palirna-frydek.cz/uploaded/file/rinizepijiraxuf.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/kdm7654hflk5jt296btkbg57ou/jakumebamuzarefumurotoz.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53e39cf22a---vututudetolunubuva.pdfIn PDF document text
    • https://wrd13.com/force/file/namujufexirivukuv.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ffada202a8---wanemumas.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/novixo.pdfIn PDF document text
    • https://webhosting4.net/media/file/lijixugolikagozabepijobe.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/kabuwilugujuwiganazaxo.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/f30aecd016df5e160a17fad2b9060a90/vetajopaxir.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3de3bdef7---gerelebinutu.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c496af8be05---loraloxeludiru.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/werirow.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/e65c09918a4df872cbc8d34b8d4eb972/sumezoxokama.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/16478395569.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/vl4semahhqlea9coatm3ea0kpf/26075318959.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=drawing+for+engineering+pdfPDF link annotation
    • 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_off0000e161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE161 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF973 16312 bytes
SHA-256: 7346a3097fbce88c2f482158bffbba5cc2db1164a4dd5a05d7638a0c1fde748f
font_02_sfnt_off000123b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B1 10448 bytes
SHA-256: d7a5d9b0c390473a5a65b5e5ff6f8684ddc9233a5c8e1cddaf7df0f00d7f1520

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