Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eded42a7c10d53f…

MALICIOUS

PDF

78.9 KB Created: 2021-08-31 20:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ad8302ba7aaadc74ae399eef39abeb6d SHA-1: d5bd97903ea2d1f079a77b2519daccb60ae1850d SHA-256: 7eded42a7c10d53f3df19f975d209c2f1447d25d10ef6190f44ad8a01e97431b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://wastran.ru/uplcv?utm_term=best+macros+for+weight+loss+and+muscle+gain PDF link annotation
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/32372728800.pdfIn PDF document text
    • http://ilovechardonnayhills.com/userimages/93717336655.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/pudiwibirolotivexifarave.pdfIn PDF document text
    • http://www.mmalappeenranta.com/tiedostot/files/rorodexusaruxatunibow.pdfIn PDF document text
    • https://steammining.com/userfiles/file/bogirozela.pdfIn PDF document text
    • https://eletroluz-al.com/_IMG/img_internas/file/8709063706.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/cf7ff55edba9c285850f7ab95e38ecaf/42585101687.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/28622212978.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d0efd69e8a---gidigoxilamiko.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0007da993---99782919720.pdfIn PDF document text
    • http://homenet-spb.ru/userfiles/file/duzaletaluti.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/e6dfe6e95023233b774363796b0c55a7/16241220657.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835ce30499a---67993014765.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/34ed56a7cffe5f9a06c2252cd9270d01/39422334993.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/roluleguviduvakikapuf.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/9085201859.pdfIn PDF document text
    • http://om-ar.com/userfiles/file/12515561875.pdfIn PDF document text
    • http://24hnbc.com/assets/ckfinder/core/connector/php/uploads/files/bapiliwedirasegugagodovu.pdfIn PDF document text
    • https://shieldtech.cz/ckfinder/userfiles/files/bazotafisimazutamuz.pdfIn PDF document text
    • http://www.otevrenysklep.cz/ckfinder/userfiles/files/96898747060.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/7411bb275b28ee8aec573dabe543063b/44057602587.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16087d2ee72b43---tinizezajovimukavamub.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/1cff6b8044eea8ef9cec911cc6ece2ea/28506960574.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d76e125fd52---78991895175.pdfIn 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://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_off0000d141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD141 16680 bytes
SHA-256: e704fe8d35c767d30cfa59cdcd3ec4f4bdd33e227f6a6c1a6e8ac3fc2a067ea5
font_01_sfnt_off0000fc56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC56 11164 bytes
SHA-256: 28d08ceb4d07fef9ebb4b00e7e4c5e01f281f553ff36563e20198e8045da3b43
font_02_sfnt_off0001161e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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