Malicious PDF — malware analysis report

Static analysis result for SHA-256 c064d15aa12b5fd1…

MALICIOUS

PDF

99.6 KB Created: 2021-06-29 01:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9c78659bf3fbeaff1f16f3909de860c3 SHA-1: c95b1a58bdd39f7e9c6af91e52039207b69122c3 SHA-256: c064d15aa12b5fd1e3add9fcc12f9cb831e929b6637a71e95fde1c1aec339e3b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate the document functions as a link farm, directing users to multiple external URLs hosted on compromised websites. The presence of numerous links on disposable or compromised hosting suggests an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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 https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/cd5f0f1b3cb485159a6f5664c2cfc826/26672877014.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/r04plht4fb81df06us86nvpt3u/jirexegitujinovav.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaad8c5b245---pusogudawog.pdf
    • http://meble-tk.pl/userfiles/file/50148375247.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce1eaba1ac---tadugosogepobusibejen.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79f0c27b04---9324166570.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8a953e070---14163862486.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8b6a227d2---99458577541.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/se2rp8ehpp6lmk6hg57if57ap5/movamewokez.pdf
    • http://files.ibiza-ferien.de/file/jijaduxor.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/07d2573633dc3aef6e5829da83b55189/68334305481.pdf
    • http://theettiaresottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/dinukofuwexunaw.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/bd0a6a4769654b95118eefe448e23d49/2564008073.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f79d274d0---tawebexanokevosekinuwu.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/eb762fa506b7dc022d411b8e3d1e07d2/pidivirib.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/3ca4ed3e86eca9b0bce13719ac71b468/7072967158.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/0nhjvu6k6jd6teg1iidimc2lc4/zezotilewomasamat.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/58335323050.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a566d26181f---dafifivan.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160923c305b21a---38281169136.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607272b8a7d86---7854668850.pdf
    • http://centrumbiznesurawicz.pl/userfiles/file/12351986375.pdf
    • http://ondrejkocar.cz/img/file/vaxuvop.pdf
    • http://kulturazebrak.cz/userfiles/muranibesaf.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=weight+and+calorie+calculator
    • 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_off000123ae.bin
fb57338ba40007c4a649110e710ccea58e15dbfe45f108b85a69eb8be9657369
pdf-font-stream PDF embedded font (sfnt) at offset 0x123AE 17252 bytes
font_01_sfnt_off0001510c.bin
9b7813e2500d65102ac96500cdf46558b45351ecd893a403bb41de7191c7fdb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1510C 10576 bytes
font_02_sfnt_off000168ea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x168EA 16792 bytes