Malicious PDF — malware analysis report

Static analysis result for SHA-256 2065e45ed66721d0…

MALICIOUS

PDF

84.1 KB Created: 2021-07-05 21:34:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8de4d9451089ffd301a86d605d2fb0c0 SHA-1: af3ff7eb634ce7dfbda4b1a35fafc8f969d5aff0 SHA-256: 2065e45ed66721d05793adf238b8263d54cc110f612245c605e9377f57a4a216
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to compromised WordPress upload directories, suggesting it functions as a link farm to distribute malicious content or phish users. The PDF itself is heavily obfuscated and does not contain readable text, but the heuristics point to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16076fd39cfec4---14615547701.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf20b239cb3---pisegosepedibusaja.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0bee316e7---bimavenobe.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/vejudowewiwe.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/3nkfa6ojiffco4i99mb9kpjm26/74354624967.pdf
    • http://huucodatlanh.com/userfiles/file/gekedakotivetut.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da160d85226---gifuzagepisebajojema.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/8e0l5tfj0u49bfjrkk7ic1obq4/tarujawurejijotopuwezut.pdf
    • http://beijingbeat.com/contents//files/fekililolot.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/83pr2vnhrjj8t3g14mjcjucu7u/piruwo.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071d589a1616---22644090875.pdf
    • http://yokohama-model.com/userfiles/files/98460887248.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc50ddb3b81---18903285443.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2cc56e31bd20d7f0e1439b0a56aabe56/26207184987.pdf
    • http://aftckwt.com/uploads/file/32974425729.pdf
    • http://rajskiewakacje.pl/userfiles/file/miwesoparulon.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c30639f2b92---56958737880.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/koierv0impgs9gcev29tmg21lk/sunogotojerivij.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160923ccaef97c---xirox.pdf
    • http://bjhtdszdh.com/v15/Upload/file/20216241538118060.pdf
    • http://tfh-filter.hu/_user/file/rumagomobotanuxumeket.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/7daf15e27481336e4eacd07afd37534d/xawovi.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86c00efe6e---37327085917.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b05c6981ca6---42544428559.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/8k0u71nbmdk6qjhl4mus11es2b/81164829495.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=placenta+coming+out
    • 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_off0000e5f1.bin
dd9a58220fb1bb45e53c0cc3d1634801e48417b4ff363ac49788a21cdaaaece7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F1 17424 bytes
font_01_sfnt_off000113a6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113A6 16792 bytes
font_02_sfnt_off00012bbd.bin
33bda0477c1b13621c5065431ea5de2d05db1c8e4bbec44f0d6b10935a1ebaa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBD 10408 bytes

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