Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ee6f0e0d6a9530…

MALICIOUS

PDF

84.7 KB Created: 2021-09-04 10:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8f13d16d168c41f400f266ed0e067b57 SHA-1: e14786ca0da09444b1ec222d94b70770d7beeda5 SHA-256: 67ee6f0e0d6a9530adfa2e9c9acc4ca0570ddb5b8250510c7e5fc8f2167ccd1d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains a link farm hosted on multiple domains, some of which appear to be compromised or disposable, suggesting an attempt to obscure the true destination. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://oishisushigd.com/uploads/files/87269759237.pdf In PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/xuwarudevefofijetumuwek.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/f62ea2f7d1046dfd3a155d03ea9272fc/12378273096.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/52975d6393daea19de89ceb87f251813/gejif.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/dikusovovodopaxim.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/966f484c1f91d13062608d07a8413694/jozevedekabegutu.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/gixabenuzotokejivusot.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/50c78f9fb71917da8993ba3e1ef3f868/veluwawowufako.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/a0e10e85a029d10d19ff40ebbb691786/xozuvurutopubipulefipum.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/92333b3d2b65eed38305d64003bcd9fd/sofipimupaxano.pdfIn PDF document text
    • http://silver1979.com/upload/file/kezewabunetotoxenuripe.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/59328859269.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///8839034547.pdfIn PDF document text
    • https://contactfm.be/userfiles/files/munidugixadamepu.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c064ab081b1---diwogogelovefivujez.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/87080587731.pdfIn PDF document text
    • http://hnkingdee.cn/Files/file/202161716247.pdfIn PDF document text
    • https://etimes.mn/uploads/files/65316885848.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/04943ff0d7e9104fcef6475a1610a948/mojejunavalosobepitamorej.pdfIn PDF document text
    • http://www.rpv-drachten.nl/files/file/rekapipuramagabukolepirel.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/28017559683.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/48189811901.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3014e4db3---jukuvawox.pdfIn PDF document text
    • http://teifsepahan.com/files/file/baziromewezefuw.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/qp7jqn26eclg0u7lan9f9vnft2/37319359198.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=kuhlau+sonatinas+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0B 10452 bytes
SHA-256: f076f81b2fa1189a72f849d829a652edf469c801d76a1f4b4373ef4d09c4f7c6
font_01_sfnt_off0000e6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A9 16448 bytes
SHA-256: 0e4cde3d5bdd5452960de995a4807c8da4ec665155a9812e2f8e54e6c49b7878
font_02_sfnt_off0000fd82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11594 18412 bytes
SHA-256: 55ec173d79998c3d909fba1e424079b6c60708d0911fc37110b7989d0b9110ab

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