Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa0772afe256c2d…

MALICIOUS

PDF

83.5 KB Created: 2021-09-18 10:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b0e0ccfae8874ff904d3f3e1d17ae954 SHA-1: 74d408ec8841f927144e7bf1190597d7a2253d3c SHA-256: 2fa0772afe256c2d20aacc28ea7dd7148af8143a9e94fc8b230f4f35dbc1606c
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to disposable hosting and compromised CMS upload directories, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://inwebjor.ru/uplcv?utm_term=love+in+the+time+of+cholera+movie+watch+online+free PDF link annotation
    • http://inruho.ru/ckfinder/userfiles/files/71378583183.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/61916387726.pdfIn PDF document text
    • http://fcgo.tw/uploadpic/files/xakasevavaleli.pdfIn PDF document text
    • https://tahubunting1.com/contents/files/81424070810.pdfIn PDF document text
    • https://millinerandassoc.com/files/file/75964697279.pdfIn PDF document text
    • http://hkacca.com/userfiles/megoku.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161416616377a4---5829173797.pdfIn PDF document text
    • https://unitedfightalliance.com/ckfinder/userfiles/files/jekidomunipupoxes.pdfIn PDF document text
    • http://gamboeng.com/assets/ckfinder/userfiles/files/6397942309.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/xafomunawuvolezulixoz.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/59917637680.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/68954876773.pdfIn PDF document text
    • http://abbaorphancare.org/survey/userfiles/files/puwiba.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136153aa7341---52865957141.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/timoradupili.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614240f1ecd10---lixivitegowaxata.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/71c1479f39e4b6bab372991bd74b1fff/86283467838.pdfIn PDF document text
    • https://casasholidays.com/scgtest/team-explore/uploads/files/95312206986.pdfIn PDF document text
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/dumaropup.pdfIn PDF document text
    • http://www.ruben.pl/ckfinder/userfiles/files/vekixu.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613de3c22e82d---86814581111.pdfIn PDF document text
    • http://lachina.cn/upload/file/53529420750.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/808758951b822af9dc8cb87877f7e921/kiwoj.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_off0000df46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF46 18448 bytes
SHA-256: f7ed3c2ea62a5c3aec13cd1c9b1b08a7a59def83a06d88e6461bfbd0c00331d4
font_01_sfnt_off00010fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBE 10540 bytes
SHA-256: e5293c031c13ff1c00d08167594d9941000fac08eb788a1cb92924bf6ecfdb18
font_02_sfnt_off00012791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12791 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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