Malicious PDF — malware analysis report

Static analysis result for SHA-256 267b1ab569b3e6e4…

MALICIOUS

PDF

96.6 KB Created: 2021-07-14 07:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7df68f2d7e1a5c638faeb8cbbd657a8b SHA-1: 3b0732f2bb0b22747e96a9098a3ff6c65cb04de1 SHA-256: 267b1ab569b3e6e4d1c486c819db1af7ba442e844f2f8c2398596463a0eb90d1
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farms pointing to potentially compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the document's structure and embedded links are designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9446

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 https://carlojans.com/cms/file/rilev.pdf In PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/999c1qa8s1rvbe52cnb967uqk6/52899667969.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/57499927526.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd87929abe---50009738416.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1af9501b4---37556537876.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/62903989733.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608065173786b---47725877438.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/lufabokonosekanu.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/db550ae77bd8748033664af587ef13f2/pazetepuzanedoxokitodatow.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/xipodi.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e1e901ef401---45165829877.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210616094735.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088881c91f10---gusulixureperubax.pdfIn PDF document text
    • http://universalgroupautos.com/files/others/73535049367.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160964490ca9cc---37061730534.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/jgc7ukhf94u9bgd5n4vbsmtmp8/vivuleb.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/1o4dfuftdcma9u8dlpjb86vgh9/22349042112.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/zanipasimavepexivofu.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/569uort3t18kg8ba2qqurs7k0o/solajikim.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/0a5ec2ad81435a97bbfd92f4adb8b452/97108548405.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/c0ccdd078b2144fd79630f15ceacc02c/38470234366.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4cf72785c---newipofivexo.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/29376069801.pdfIn PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/sojukugonede.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6cb4a569a---30743544023.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/9157099395.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce57fd5ffc---vepabipir.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/2540113010.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=jump+force+obb+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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CB 10740 bytes
SHA-256: c6707cc0641a52a41aa90cb6f2e69f2d3419610eece72b731fefe270e2808de3
font_01_sfnt_off00011145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11145 17192 bytes
SHA-256: 25d30294c332c6c5cec1739287ea520256e31ec339645411feb3fd55f8a8e2be
font_02_sfnt_off00013e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15640 1696 bytes
SHA-256: 28c5bcedffb0f63c0f18ed07264126f7c833899b916de9a351f9850be7cb6bae
font_04_sfnt_off00015e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E4B 16132 bytes
SHA-256: eb83fb48a2f60ac59fad768156047f025764cad4052c8f34695a9c8dd2456ad8

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