Malicious PDF — malware analysis report

Static analysis result for SHA-256 f147a4d118612864…

MALICIOUS

PDF

80.5 KB Created: 2021-09-03 20:52:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a8c288a441615985705fd85b10d187cb SHA-1: 308c3423a505cba93485a3dc2e92c61d3ea864a8 SHA-256: f147a4d11861286499437291e0c02e4547b184d1134daebe753eeb641154ec3e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised WordPress installations. The presence of these links suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://daydala.com/userfiles/file/91018702939.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a920eeaf328---64134044620.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160846e4147c49---jojamajaxewit.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9162f0186b67c31b5220a2c6e1ccdc37/pomutusefak.pdf
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/mizedetukawi.pdf
    • http://pritchardreunion.com/clients/81409/File/17538314190.pdf
    • http://goldmustang.ru/files/files/negosezuwapafigunojafibu.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/bad4026ab2645f9da50b5b442e56be7a/vufezo.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd66bac1f5---50620210270.pdf
    • https://pakianco.ir/data/image/uploads/news/files/mofidegukijo.pdf
    • http://geometrabottero.it/userfiles/files/89216672444.pdf
    • http://upakuika.com/img/file/biresasaw.pdf
    • http://stagnesreunion.com/clients/e/ed/ed16748122b3ff8ec97113314e0446c4/File/tikaru.pdf
    • https://viettincapital.vn/upload/files/menufamipamumotuvuma.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c645cd584b7---29165314248.pdf
    • http://zlato-invest.cz/upload/files/gojal.pdf
    • https://europacreativaeuskadi.eu/files/galeria/files/rolamarovipaladibisibisuz.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/3108b9464d22f2f612b15b2c3e15b195/duxujojuwebaxejul.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160913ec2ed3d2---38157396343.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a173a0e7ac---24812728062.pdf
    • http://e-hematologica.com/users//file/92870677480.pdf
    • http://cx-gl.hu/images/files/mekolikotamadeva.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609af895c7a79---wataf.pdf
    • http://ukrainski-rosyjski.pl/userfiles/file/89474188180.pdf
    • https://eliteplacementagency.com/uploads/files/26523280452.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/a57355a58da0232aec930f46c722e02a/suvokepufikevapedeti.pdf
    • https://groupburuemas1.com/contents/files/88728675186.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=anatomy+of+the+lungs+and+respiratory+system+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_off0000d708.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD708 16792 bytes
font_01_sfnt_off0000ef1f.bin
46a79f80a7695cfe97e7f209fb0801a917ef423f4d0616cd39e887a31e91bfe3
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1F 11140 bytes
font_02_sfnt_off000108bf.bin
05fbe5b6cbe6600dd82b0ebe4c240de5494d4c8079dffd091251097f465ebdf8
pdf-font-stream PDF embedded font (sfnt) at offset 0x108BF 16752 bytes