Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a67805962a6fde…

MALICIOUS

PDF

92.3 KB Created: 2021-07-19 18:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 62c224a5429e81ea45f36ec6ee266bed SHA-1: 72236e586cf8551a8cefbd31c3e1f806ac5e227d SHA-256: e0a67805962a6fde875d5746cfedc279d47b53701a1463a46f8505dae121d9fe
156 Risk Score

Malware Insights

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

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm pointing to compromised WordPress sites and disposable hosting. The embedded URLs, such as http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160a68bb838335---20620593335.pdf, likely serve as lures to phishing or malware distribution sites. The document body is unreadable, but the overall structure and heuristic firings strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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 http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160abefb56ae04---fazitadeko.pdf In PDF document text
    • http://mtcclassof81.com/clients/0/0a/0a45bd3013a8cc77df817aa526a911b1/File/58551550065.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ac500e2ac---42115135429.pdfIn PDF document text
    • http://azizolace.cz/images/file/guvaladofiveboso.pdfIn PDF document text
    • http://wenxuezj.com/images/File/zutinakagafuduv.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/54329245109.pdfIn PDF document text
    • https://alyansdugunsalonu.com/userfiles/files/nurelopasipubologogaluxu.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/93655198610.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba46ad8cde---razokuk.pdfIn PDF document text
    • http://duepassidalcentro.it/userfiles/files/nebiferitozu.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/mukomojabojuwizive.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles//files/gorolokovokogofigimowos.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16095dc17da495---40876864808.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/valibabasolixivenadawiwob.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/59672565821.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f018e8d9ac5---73174554005.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160a68bb838335---20620593335.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/gufasujo.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/25631266468.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/33410900319.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/vimabobojokaxamewetexego.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/e0d685085b8f8d223ef86303f2de868a/sanexikara.pdfIn PDF document text
    • http://rolfingnaples.com/clients/a/a5/a5422f62036d2d393d866963e902351c/File/83006388654.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/177251005460a4695d59f79.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/denonexunodeguk.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607375c388fcf---livuwixibedave.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=add+two+pdf+togetherPDF 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA82 18144 bytes
SHA-256: b9541c16c66fb590f7ea4c18c2b4ffb1e959d6615339ea4f092b1cd75180d137
font_01_sfnt_off000129cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000141d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141D8 1880 bytes
SHA-256: 2a945473856d72e45a5a92416c6ad7011715f8291cecb92ffddb943de1d8b2cc
font_03_sfnt_off00014a9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A9E 10272 bytes
SHA-256: 28f584662b4ec6e8c2988b31a0125f018869370f38d8388f493123853319ee7d

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