Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eedeed8784d6944…

MALICIOUS

PDF

87.5 KB Created: 2021-07-22 00:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: ff5db4d34c7ed99fc3b79d1c2da503a2 SHA-1: 6100c893b26d902c4291e322d606226cecfb1e99 SHA-256: 7eedeed8784d6944d5a369f05406a3e583b35c926e81ef35ee56c0abe3bd2bf5
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple links on potentially compromised infrastructure suggests an attempt to obscure the true destination or leverage trusted domains for initial distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://energo-market.ru/sadm_files/reduboni.pdf In PDF document text
    • https://kham.vn/userfiles/file/97427270841.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a94dc938f2.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c3e74efa7---33924433873.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/46023751899.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1623294793660757319.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/83cov095u9qniaiccb8i7362v5/72196031014.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/bea7c15295dde347e9193b02fb7e69be/remoxe.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/51552225614.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/47812810483.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/fawopapid.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/zuwugadililimowavepodiwe.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/kkafst5p0k00037mhg5phjk195/98542365708.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/rol67677e893rtvc4f7pdfdvqf/28390148666.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/4g8fbcva053ir9noikr128e5g1/64562749632.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/atrgajdo7heu6olcbc1t2rvkaj/sarisatipiguvomujudit.pdfIn PDF document text
    • https://pindimana.in/uploads/file/58834641480.pdfIn PDF document text
    • http://citra.cl/userfiles/file/bepubov.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/mubalimavo.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609855c1ae386---43747011272.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/5052574563.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/ed910557ba8e8baf2a8d9768d4210199/zonivune.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/3e04d4112b4d68de5a1042e16b77bee4/rajelevenovamemer.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/komuxok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=revelation+and+the+old+testament+student+book+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_off0000ef8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8C 11108 bytes
SHA-256: 716dcda9f52324abeb001cf1616d9106f6a4310534015c3e18874487159a755e
font_01_sfnt_off0001090b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001211d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211D 17492 bytes
SHA-256: 92927c11d6d0b5940fd1c5ae818cdb6b4100e6d65b6ba38f1a3ab0345b493b11