Malicious PDF — malware analysis report

Static analysis result for SHA-256 02088f4cd8bc3e98…

MALICIOUS

PDF

84.0 KB Created: 2021-07-03 13:34:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1947169b64c7f37b1185205de55edbee SHA-1: fe2f85d53540bb2251a67c699a7a9091179d5392 SHA-256: 02088f4cd8bc3e98862adacfe68484ed226aaa00f500ce32a498ddbeacb05dd3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous links pointing to compromised WordPress sites, indicating a likely phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, with the links serving as a lure for users to download further payloads or visit malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fd3e67f03---19062187774.pdf In PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/0h2274lh9ddc2gj3ad4df5cqsq/kisominokufejafifar.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/ouefnlp7bfeo5vmo6fvf7t0mhd/lomegesasibob.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609459febc5c0---19039472015.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b307ba7e77d---bikidigubitagapubemus.pdfIn PDF document text
    • https://kueapem.com/contents//files/tufegobitop.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210529084203.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210527183703.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608443c773fa9---juwomiruxusasule.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/falirasugaw.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cc36150ce68---jibupinorarami.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160850ddd29aec---67327225544.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/808tbt6k2o6p1um0718dbn6bp3/solekokoxifanoribovapox.pdfIn PDF document text
    • https://unicornccc.com/ckfinder/userfiles/files/13978871999.pdfIn PDF document text
    • http://portalkucharski.pl/app/webroot/media/files/83796954173.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16082d5a3a529b---bumojuwesevezu.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/43d8e59d86de2b09d4a9b7b3300612cb/busiwanadivun.pdfIn PDF document text
    • http://aweibel.com/Photo/file/27906224596.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/vusetex.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/9705610732.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/12c05ab610a7da2b9e345965083750b7/tetakoxokufojiridiwe.pdfIn PDF document text
    • http://www.alrafeef.com/faisaliya/js/ckfinder/userfiles/files/lepafukiwusaxefebaronud.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/tapufakotunedakef.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/f46cnboan9dqrceuepk9gbtqog/kerolalowatuvu.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/60130900608.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=non+chord+tones+music+theoryPDF 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_off0000e698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE698 10620 bytes
SHA-256: 4fd866945d56fde8431fa12d94ed74c536d22ecc43496c71c57de8a44fbed154
font_01_sfnt_off0000feba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CC 16320 bytes
SHA-256: 3dfcc2f90a9ce2947b062b7f5549e8310ce1e98e1c1b9aab017db88693322945