Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b082be7a9194cc…

MALICIOUS

PDF

92.4 KB Created: 2021-06-28 07:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 18153bf91120e122c6aa75b7f8a9dd82 SHA-1: 16c4716f083b2fd6fac67ef927dc3353916ac663 SHA-256: 60b082be7a9194cc523b8f94f0381c3a5e3dd8af4cd7577c160f23f346d9bb3b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised WordPress upload directories, suggesting it is used to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, but the presence of external URI links and compromised CMS upload links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609895134fe7d---27323126660.pdf In PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/356e815e58373f06b5c0ea73fc86725c/xaxalupakemiv.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/ce34bf45c6b27c1be8f93ed2c1f66f7d/96150627942.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839184d1bfa---71496452048.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607eaf3887a1e---52857629791.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/jiwuraxekinivudodemakikul.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/aca639f718e142b14f6ae9f98e6bccb8/41838901456.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/1601456385.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f69ada6d03---wopele.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/vjolr63qe9faqhnbr1hski4ldu/xebeguxesusupawaka.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/jixojalonumifate.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210517212720_v3ttzn.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/ec049775ac487fc362ca3886d7ed6824/85348587172.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16091c3b40b4d3---kexisebidizufawapelalasi.pdfIn PDF document text
    • http://short-story.ru/upload/file/ronumexavosub.pdfIn PDF document text
    • https://ilmercatinosottocasa.com/file/5464949806.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/4001024557.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/jigijumiwuroxexujina.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d63874f3d6---zafuxojogom.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/he0bt3mo0j3gdfd6751ps5nt6o/6553934067.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/2eb143f0e231d8eb95c551da740ce7a9/59440361207.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/q0te0lts15pme49rcreuidilq0/xopowefufipaziva.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/penugoxaminoxuv.pdfIn PDF document text
    • http://aristosaigonhotel.vn/uploads/files/zufen.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/20e4bdca38e64b7997c3efd456e398e4/68376880413.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160839a41d5a01---zegevoxazamovowowe.pdfIn PDF document text
    • http://livinglearningandworking.org/clients/e/e0/e05af8355f71d8da3aa90f500b9284b3/File/82090816608.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=more+precious+than+silver+and+goldPDF 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_off0001073d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073D 16800 bytes
SHA-256: b5c35b56cfa3e6205954184ab5b4c8bea8592a3bcf0207a162c71910336470c1
font_01_sfnt_off000132ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B04 10952 bytes
SHA-256: 98e43e381d2c513c04f133129a5bd012c475f6756c729e5834943fef3f7e5986