Malicious PDF — malware analysis report

Static analysis result for SHA-256 b58d279b069372c6…

MALICIOUS

PDF

83.9 KB Created: 2021-09-17 03:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 756fb40e24b8219cdc66aa18767d0d43 SHA-1: 2e32558696a3e6952eef187bb444ea2cf997e0f8 SHA-256: b58d279b069372c67c52300f3f1851356611956105eac5cb676371e6910bdaae
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://oniceh.ru/uplcv?utm_term=moto+file+manager+apk PDF link annotation
    • https://cplastik.net/data/cms/file/53006414603.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e3ee1d25e1---togijifopebibikag.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/47968271005.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbede87cc2---27000931606.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/7e155637f1cd13e4baa4bc22a5737077/fugiserowumibavez.pdfIn PDF document text
    • http://bioaec.com/userfiles/files/nanogozi.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/tevapiwikerigataxu.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/70979778203.pdfIn PDF document text
    • https://falconshipping-uae.com/userfiles/files/jibefepobabutinamoxetiwem.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/u6h52j2ngf0gs764emnh425duq/18544096328.pdfIn PDF document text
    • http://prakseologia.eu/userfiles/file/jirobokab.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/sovon.pdfIn PDF document text
    • http://vanprodukt.cz/UserFiles/File/29751847466.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/tudigeguvegarojivulasejes.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/mafabesise.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/97741160127.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/jelosomubenokuxuvisap.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/dolev.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1613eff68a736c---begeridiwidikubo.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/jijaniredobuxalugufivi.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/71941774489.pdfIn PDF document text
    • https://leganordavigliana.com/uploads/file/8222929824.pdfIn PDF document text
    • https://fuoriscena.eu/file/vexixinujezowanutidu.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/palulobedukafojal.pdfIn PDF document text
    • 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_off0000e236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE236 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA48 18312 bytes
SHA-256: 786b7975db152c8b5f028240c147dd73f026c52a225796db74f0232247984606
font_02_sfnt_off000129ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129EF 10620 bytes
SHA-256: b30729e1e227abd294076ede4ea95a6c606cf53c0e5b96477c0d5e402fdc8969

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