Malicious PDF — malware analysis report

Static analysis result for SHA-256 307ee80472ba6aec…

MALICIOUS

PDF

95.4 KB Created: 2021-06-27 18:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ea72e0a766d718904692619546d16ba6 SHA-1: 4ddd3dc0b456cc21911698b7d19139c0bf97ec41 SHA-256: 307ee80472ba6aeccfc9d3d49b6b232f3ddedebe7de47002646f482f60dba1e3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which appear to be compromised or disposable hosting. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass security scanning. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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 https://crewmak.ru/uplcv?utm_term=psalm+91+in+tamil+bible
    • https://aimhc.com/userfiles/file/40552410663.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc50b3708f---pepuvufuxoforaxedola.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/8e0l5tfj0u49bfjrkk7ic1obq4/tarujawurejijotopuwezut.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759d4153aa5---sizilafifez.pdf
    • http://gallery4walls.com/upload/editer/file/51562958682.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/92d79a50c4c3381f1a6fdf5dd19453dc/dobojijekiresa.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607465bf76dc8---5277233113.pdf
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081915883871---rogodirozoxibe.pdf
    • http://caopump.com/admin/userfiles/file/kikosuvivorifum.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/15948456121.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16080e92bd45ea---basajuvudixalidetozub.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/8d8b4180974c704a0eda36749f06979f/tezefupu.pdf
    • http://teormech.ru/teormech/usrimg/file/jivulerimabiruv.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d23543422ed---75425123597.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/4a65c33877df2756442147f6bb54dacb/nuwurefixupodakogunix.pdf
    • https://tavio.ru/files/file/ximidunoz.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/0557c8ede197808ecaeba58486b0a921/57694060912.pdf
    • https://wotfiles.com/ckfinder/userfiles/files/95721613488.pdf
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/xorakuvuzov.pdf
    • https://advance-pack.com/editor_upload/file/93949027052.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/05219c601d4a29fdf8edebe8b42acc67/18756996959.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abf847345e6---zesomuduniwi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f23d.bin
1de1370d79603e5cfabe5b0b11a6a2cc6764fb913bd8c91b98c8c762846452a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF23D 10412 bytes
font_01_sfnt_off000109d7.bin
6fd80547d365896cd781f2c7e33c83284e4b9114c9d44be4d54f9480fb9e7411
pdf-font-stream PDF embedded font (sfnt) at offset 0x109D7 19420 bytes
font_02_sfnt_off00012ad2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD2 16792 bytes
font_03_sfnt_off000142e4.bin
0d72e72ad74ab1242d9b0155fe0f823b8ce7833633050682b45aa5b331dabe9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x142E4 17732 bytes