Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e422943f61b32a…

MALICIOUS

PDF

89.6 KB Created: 2021-07-03 05:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 4254c457106e590fc141487c1f42f81e SHA-1: 5622ea44dff5164f8d19dc515e62df3a38e38d54 SHA-256: 03e422943f61b32a9841b7f247d00ba01ab311f7869ba3bfe6596f096abf8832
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable, but the presence of many external links is sufficient evidence of a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://aclamerica.com/customers/CMS-IMAGES/file/60276408405.pdf In PDF document text
    • http://minhledtran.com/luutru/files/65739484777.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718f5b7b887---nadafa.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80259790e5---56963900735.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/mufovajafiwowiv.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c740e97d014---jaliworinamuwefumimigan.pdfIn PDF document text
    • https://chinese-wall.tw/upload/files/95924570766.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160904699268c7---dijup.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/28022990673.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/45bd12530deda7dfd52032311d4f81fc/94363963873.pdfIn PDF document text
    • https://lecachet.fr/docs/files/vudemuladivaxosedovenidi.pdfIn PDF document text
    • http://limoride.net/gallery/file/75263688981.pdfIn PDF document text
    • http://yao-cheng.com/uploadfiles/20210703005205.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/wetejowiwo.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/786b2eaf30a5b364b2fc396eedfdded7/dulabomu.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/09c3b49188f87c4d32bc289a03b091c2/93750319615.pdfIn PDF document text
    • https://nada70.org/userfiles/file/gudekeriga.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/47117116272.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160df98cee7fea---jekepu.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/guvivegemupusaz.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/7e394ae01ba96937f157087452656686/367069275.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=skin+whitening+capsules+side+effectsPDF 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_off0000fc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1F 11032 bytes
SHA-256: 29525f278dc7514f69057a5faed1ec835694692f11484162b29b0fd187a69171
font_01_sfnt_off00011590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11590 16832 bytes
SHA-256: f8d805d8be93497dbcb770b30d68e74b6b89704072848ddcf8150367c4e1bd7e
font_02_sfnt_off0001416d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1416D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.