Malicious PDF — malware analysis report

Static analysis result for SHA-256 d110f474e25c2288…

MALICIOUS

PDF

107.6 KB Created: 2021-09-01 10:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fcd9fa715ed943b86bfd6a6e651918c1 SHA-1: 8746e9efd5dc1b5afe53aeab521130627a996139 SHA-256: d110f474e25c22883a37bf38fc008056f42d42f16efa883318d1253ae4cd46d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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 https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/56a07124647ee6eea2030db6e4df4095/1844269284.pdf In PDF document text
    • http://exito-opakowania.pl/userfiles/file/62096594659.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/791mgucdj7rtnffsj9esjh9ju8/69463970515.pdfIn PDF document text
    • http://nhatngungoisaoxanh.com/upload/files/bitiwifim.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/617tu68g3hjs7gvbs601drbv10/fedakakubateropomopapisi.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/23334375627.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/b92c2003879d19d4487ad52e53c9d37b/27563043903.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/1891a7b2030612901a1b16e25b5afd02/27638509818.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/69331902362.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/kipakutukuvade.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160c06563a5735---guwodemelerepeniresit.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/vepamajezavomebewamapa.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/6eaf594efdfbe9734b5abba303bd6cbc/86567511961.pdfIn PDF document text
    • http://namthangbasaltstone.com/uploads/image/files/jurip.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/19r46ng9s2khdq00b6afbvee1i/85043535977.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4b87494b38---80924253777.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609865ba63a2e---jamegomutedupebujaj.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/df86751bc189ee0dd4f3cbe72c59dc29/84228970079.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/fuwibarawufenazu.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9166f6aafe---wukus.pdfIn PDF document text
    • http://sam-global.ch/files/file/37168334611.pdfIn PDF document text
    • http://zhfangyuan.com/uploadfiles/files/xoruwudawi.pdfIn PDF document text
    • http://gilbertthomasreunion.com/clients/5/5f/5f56fe696be94dde62972871c8a9bc28/File/kuvigibovefiva.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/fubasol.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b360e824a3b---jumozogimuno.pdfIn PDF document text
    • https://glaze-metalart.com/upload/files/wubirinuje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=the+alchemist+the+whole+universe+conspiresPDF 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_off00013a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A65 19952 bytes
SHA-256: dd93b40408c34aa456423d48b18747153274634fa31d48ec04cf7c307fe9784e
font_01_sfnt_off00016eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EB2 10852 bytes
SHA-256: 4d6cdc2ccd83143d7204dbb2f818569916352beef8cdeb126c7879d901f90648
font_02_sfnt_off000187a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1