Malicious PDF — malware analysis report

Static analysis result for SHA-256 15a0ef0e0f7914a8…

MALICIOUS

PDF

251.7 KB Created: 2021-06-19 13:16:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 381cbd5d126ce7f1b81e34c4d68ec0c9 SHA-1: 4beb0422ebeedb95562ee5e0d65e3796f961b741 SHA-256: 15a0ef0e0f7914a8cc25ca11e31cf370b36ea5965b12121e530b2dd68f0c50c3
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious phishing content. It contains links to compromised CMS upload storage, suggesting it's part of a campaign to distribute malware or phish credentials. The document body, though heavily garbled, contains strings related to file metadata and a URL, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://coretry.ru/uplcv?utm_term=turkish+march+flute PDF link annotation
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16087a19e4d3b2---fivib.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/8b8c1a26fdae9ba247b614e0eff7d32c/nasolifuzososipugir.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160734c3560771---daxumitasogu.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c08100d23bf---kutek.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c666bd3c84d---mebowupixepowedagojufufaw.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160cce18b77c83---pulukinewovobapazizexe.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/89383402324.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb30b48ca7---68876627478.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/ketar.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/35640564692.pdfIn PDF document text
    • http://aimic.com/userfiles/file/jawazatuvosogoxiri.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/1sn9gcm1rl64j3ohrst7g84gqr/zozijeg.pdfIn PDF document text
    • https://akita-inu.lv/www/files/files/siferobirovudenose.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8f5d6f712---makawudesabar.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a58d680b914---faxaxamedikit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00037ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37ED2 5132 bytes
SHA-256: 84785078decd6f93ff6945a0a34ea74ae484f5ffd40ac429b29e6df3b0468091
font_01_sfnt_off00039015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39015 9496 bytes
SHA-256: ba054c04ee34dad04a5e363f5cb1c8e299ae96cee19ffa951f3acad5f8d51255
font_02_sfnt_off0003aeef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AEEF 15208 bytes
SHA-256: d1bad079d85f57bff1676e4aa16567182733ddfd9f29606298666c11a9b7426b