Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b2268ae1c728eed…

MALICIOUS

PDF

95.7 KB Created: 2021-06-28 19:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ca2dcec45725dbb7dd690cda80b6c18c SHA-1: 35fcf2708f72ec15181a19d9bc425357899680fd SHA-256: 0b2268ae1c728eed5a018ea3079221935d2d7b4197a84bf5ed364056a259c360
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL analysis and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://anhbanglaw.com/userfiles/file/23640278930.pdf In PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/bumuwifisiwi.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/9uubbqs2fmhf9sltfp96l1nvhg/tisonizenidiridiwipozes.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/hrpaj6s04995v3i8iqa6vovaq2/75002452730.pdfIn PDF document text
    • http://mousike.it/img_ins/files/20052624111.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aab9b01e798---55749593843.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a9daa2d65---75108784231.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160919687724fa---21335386792.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/25395428fe4c5298b6743790d5c98c31/tinufamudazavi.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/r270r78b9as6ukd9q5f5rpotbh/basanufosalejozasebaxexar.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/49825344919.pdfIn PDF document text
    • http://hzkontejnery.cz/ckfinder/userfiles/files/tojovesososiriri.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/9a8d82e1af6cda3b6d82eaef53684b13/koxukibevenufebiwumijewad.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8594c68c59---77882734096.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/27271615874.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8810f3b88---sizasomesajunegivef.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb1a224715---90584790392.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7ca17b5b2---56623728198.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/iodj3rlfao591krqlhmbpar0g7/pirilunakosatagex.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/4jdv8uaip7a0j3ks5gsela13t2/zerofix.pdfIn PDF document text
    • http://kubak-ubezpieczenia.pl/userfiles/file/49749131543.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/a03c73574a442e60d2ae5aa38d6dd85e/57549309477.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/87101890572.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/b03d74c157532000378d6acf06f2eaf6/34977850586.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/nujagojadoxibepiwodirosan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=nonprofit+organization+interview+questions+and+answersPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BA 17792 bytes
SHA-256: fbb89f52d6edc2c829b8eb6c33ade0404da17b311566d31f4313a03617cfb24b
font_01_sfnt_off00013f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F66 11064 bytes
SHA-256: 05b9449e80c2e6024bec9bf6b14a67db0d79e351ee9a1efabb5443c976a754bf
font_02_sfnt_off000158e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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