Malicious PDF — malware analysis report

Static analysis result for SHA-256 d22dd2b05caa2f45…

MALICIOUS

PDF

90.1 KB Created: 2021-07-27 04:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0d303959abe4117e7f72fbe5204bdad6 SHA-1: 424aaaaa5dbcb52b83e83c55b83fcc4d7de0e534 SHA-256: d22dd2b05caa2f45987e964d9cbe9efefbefe07e330aaabfe0a474f2c8d3e332
196 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of a 'Password-protected archive handoff' heuristic suggests the document is designed to trick users into downloading an encrypted payload, which is then likely decrypted using a password provided within the document itself. Numerous URLs pointing to compromised WordPress sites and disposable hosting reinforce the link farm and potential phishing lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bce31994dd---pogorun.pdf In PDF document text
    • http://worldcar.jp/userfiles/files/kolivedexanusuvuni.pdfIn PDF document text
    • http://pgpartyrentals-decor.com/clients/9/9b/9b45d36a3a4d562467d70d81bd292783/File/96815877726.pdfIn PDF document text
    • http://ktcz.eu/files/files/17571526140.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d882699849a---nusovuzukutoxopopopenu.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/c9c483b69be75bcc4fa3d643b88bcda0/18770730659.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160df5fe322bb1---rupurirufife.pdfIn PDF document text
    • http://eg-connect.com/uploads/editorfiles/file///bavugi.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/riretavekajajewokawov.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/junid.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/42941918022.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/jonojepanobixafasivokox.pdfIn PDF document text
    • https://12shio2.com/contents//files/sujolezobebunitu.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/vixezabativid.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/5f690c4b156663cf114929e3f9f251aa/97636820902.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/36875553aa8cd78c896b9bb7fe6a0d54/nebugijuzamiladujoz.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/78826477966.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/b4389r135rqnq4ldk0ulbt2sed/31703663341.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/2bnr7ubmf5ches5o7p2b5loj69/96637076586.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/28522405786.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/d6c7d8a768b56a1e17a8cdef6b8c1d2b/48970362192.pdfIn PDF document text
    • https://clubelsendero.com/img_pag/file/10109482222.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/dc6d2a76488a6b7c98c2e335e2cc657c/40146744921.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/54981329720.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/9dfd8e0f4f8ac6bc6038a1efd8fcfa51/30200244482.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/54102013463.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=what+is+a+non+conformance+iso+9001PDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7D 17320 bytes
SHA-256: f3521851c0a619cc57c2c3f7fb9978482e3475f9102907c04ff6d3d966b0328b
font_01_sfnt_off000128dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DD 10892 bytes
SHA-256: db1439721aef83c0579efeeb0ecc23942bc0dc4814861df96be26f9e34076b49
font_02_sfnt_off000141ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1