Malicious PDF — malware analysis report

Static analysis result for SHA-256 e17f19980c9306ee…

MALICIOUS

PDF

97.3 KB Created: 2021-07-16 04:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: da61529ddb96e434a644ed2c1e59e667 SHA-1: c1e57d0088154beb649673ef50ffe9e15d6a25aa SHA-256: e17f19980c9306ee6e19752e10f9c0e1150bba2360fcf24ed3a154183c048793
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or further compromise. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9712

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://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3a187a854---60597922222.pdf In PDF document text
    • http://dgjst.com/upfile/file/88506450159.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f66ae876f---lunuxo.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16071d80666d6c---sutisizelazosaroka.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/61680699655.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/e1bd0497db11891ace9c08ee7571cae2/roxuxodejed.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b2070a981eb---xajejomerixanusekim.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e205bdfdf---xotuluzuva.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/gubaberojelemevudoreg.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/44095525501.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/pafetip.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2418f5311d---xevirim.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/venerajiwitigojajuripog.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16099485f67f29---59600059760.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d65f348035---jamogatikamalavalojetaju.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/kakimarapupejifefozu.pdfIn PDF document text
    • http://businessdevelopmentcenter.pl/uploads/userfiles/files/mubimufejipulekuradin.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6b655c988---lefutas.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/74997521241.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/pitagufaridax.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/3421649927.pdfIn PDF document text
    • http://balogmihaly.hu/UserFiles/file/32426401968.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///navoridevivevazejugul.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/smk53obpjd2psbn7vetbk08r1g/beriguwilusi.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89902495777.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160885667aa3f3---volekufimuperutilogonab.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/564b0c24ca8015bf083c6f66da198850/37101259002.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=100+chemical+formula+by+criss+cross+methodPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2A 19444 bytes
SHA-256: a5d83a3a8a1ee45ecd2f958a0ee388507d30c03a1c00d6840975323b82a3e555
font_01_sfnt_off00012dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DDA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000145f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145F1 11068 bytes
SHA-256: 598a20c32f6b923df475ea29cea137ca8d0b775205659603c4feccdad8526561
font_03_sfnt_off00015fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FBA 16564 bytes
SHA-256: d7dea68d5ce039da947ba3ec51f65d5d9918b7ce67725c9a792ee3c665f6734d