Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcceb28cc3aa07e3…

MALICIOUS

PDF

72.4 KB Created: 2021-09-18 14:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6845f3f5c312c56e9f8e60f593f94740 SHA-1: 39c52faa6699e5169c35af92f29c6d3b566f918a SHA-256: bcceb28cc3aa07e3051cb8f39ed02f0a8630cc99235759ffb2d0b6736d2f3a01
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on compromised or disposable domains, 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 URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://krisoc.ru/uplcv?utm_term=talking+villagers+minecraft+mod
    • https://alhurwallpaper.com/Files/files/sebevejeregagov.pdf
    • http://restokrat.info/userfiles/file/73084504900.pdf
    • https://rtquery.reitoken.org/Coaching123/images/files/76782135909.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/lc3pelb1864qa68fdteom86e50/25791766655.pdf
    • http://cistenivytahu.cz/upload/file/xusarirejavakonatodu.pdf
    • http://firewaterdamagedfw.com/test/fckeditor/uploadfiles/file/lofedifagule.pdf
    • http://shesob.com/file/files/38844791543.pdf
    • https://whitesal.com/data/images/file/5614_20210918023532.pdf
    • http://adbrf.com/files/fckeditor/file/3025778266133fc08e6347.pdf
    • https://alpinebadmintonacademy.com/ckfinder/userfiles/files/14169989355.pdf
    • http://remont-m.com/userfiles/file/jatobebagibut.pdf
    • https://path.mn/userfiles/files/tuladunakeliji.pdf
    • http://lignumweb.com/site/webroot/uploads/files/89780065952.pdf
    • https://njshore.drinkpoint.com/uploads/files/68990275989.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161406c5822fbe---42319867245.pdf
    • https://chptravel.ir/data/file/zajokedaw.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141a124d50d3---guwaruvewokakedirapewid.pdf
    • https://vozilasavozacem.rs/files/megiguwobawuguzu.pdf
    • http://fornacedelia.it/userfiles/files/vimevawin.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/t5ahrjlr7qjgbjv0ved8k5uk5k/21828745661.pdf
    • https://stepweystudy.com/ckfinder/userfiles/files/wazegixataxazipabaxorak.pdf
    • http://www.pattyn360.com/upload/forum/files/dapivaminazufirog.pdf
    • http://ahcxdq.com/uploads/file/071858498672.pdf
    • https://xyoaa.org/sites/default/files/files/fexolidulizuvojiguzuvisuv.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8ca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8CA 16792 bytes
font_01_sfnt_off0000d0e1.bin
d8d723e65fe9caf191aefaee2f9045b46846524bc83befd5fbe5b01ab141c238		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E1 10940 bytes
font_02_sfnt_off0000ea11.bin
d358e5f9401d3d7e89c3393cddafaff08533910a581ef214d67dca1524d779a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA11 15624 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.