Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e75f5ba3823738…

MALICIOUS

PDF

83.2 KB Created: 2021-08-22 00:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 48573930a11d0da7f2a09b34482434bf SHA-1: 4eccc82ce6ba4118312c7cbd500d86bdd7651aeb SHA-256: 66e75f5ba38237382d54bd2ed98daa27a0c8fa25c7994641649e319dd9732493
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of multiple PDF-specific heuristics related to URI and link farms supports this conclusion.

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 http://gamax-motor.cz/data/dokumenty/78369538682.pdf In PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/8d9047610ad8e83e2b02cf9bddd1027f/48212255756.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ddac6a797---tuzipaligarufatamone.pdfIn PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/13529454602.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/21794346352.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/wakevinasozotujaxoru.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ae370855206---pezivapaw.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202108031528433214.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6640bb3f9---5966214979.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/d860e8a28636541c11cda0306fb34f5b/madodisanozowefesuzamab.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-5-15/20210515130354804674.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607d49d8b4046---99082932864.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16072ab609360a---pukevevisuwetepiwi.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/mixunagifidox.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/a1042339a4be06416de6c69ada0a4852/17757133983.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/wabapupokupojo.pdfIn PDF document text
    • http://lagostena.it/userfiles/files/vemokulepisedorovete.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/80121949690.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/89052441283.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/4ce63mvf9kvcdt8p7j9c2uk4e5/rekidexebu.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/novufuforulijofofox.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094342fb0b73---44784496899.pdfIn PDF document text
    • https://art-gallery.mn/uploads/files/84661286589.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/cdd8187a591f446143bc96e8bffc064e/suxijegekovek.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/eccb7869c829eae9beb41a342b162c9e/teravaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=clash+royale+free+gems+hack+downloadPDF 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_off0000e0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D9 17084 bytes
SHA-256: c49b54f1d415dcfff1785fa3144951e19250195eaa696f3dbe10364127bd2ae7
font_01_sfnt_off00010d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A8 11056 bytes
SHA-256: 438086f63eea2cf0840226f7635e600aa54d7febf2792eecadc5e3dd80c01d56

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