Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a58a1700fe8a1a…

MALICIOUS

PDF

85.2 KB Created: 2021-09-04 21:35:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4482e8b696d75b77a8f72b4e70061212 SHA-1: 18270d6da27df5515871543e73b7812e0fa86040 SHA-256: c0a58a1700fe8a1a9e962524b4b25094e52ed22250af2db8323b9864044cb517
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a large number of external URIs, many pointing to compromised WordPress sites, suggesting it is used to redirect users to phishing or malware-hosting sites. The presence of embedded JavaScript indicates an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://pixomot.ru/uplcv?utm_term=agency+problem+and+agency+cost+pdf PDF link annotation
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/3fb6c525dfd26d160fd2b8573704f871/6268077098.pdfIn PDF document text
    • https://aljazeerahdrilling.com/userfiles/files/34672189499.pdfIn PDF document text
    • http://arlingtonhigh1961.com/clients/e/ef/ef36f0800c0a5d5a0b00d5ecc8c3c6da/File/48802334610.pdfIn PDF document text
    • http://sinojjacob.com/userfiles/file/22698743454.pdfIn PDF document text
    • https://teyadegitimvideo.com/calisma2/files/uploads/68605286232.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099eadade4fb---92462378907.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/8jicv2ofmrp2pjugqmkseqtpf9/sezininu.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/xegomuvitinifoza.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/25346545991.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/6139643493.pdfIn PDF document text
    • https://curvy.tw/upload/files/82226040266.pdfIn PDF document text
    • http://inse.us/uploads/images//files/pewewisofisuropogajufesad.pdfIn PDF document text
    • http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/244e77d97c728d617f3bf40a404a9c13/51043985412.pdfIn PDF document text
    • http://volvo-cars.jp/js/upload/files/10838711570.pdfIn PDF document text
    • http://barefoot.pl/userfiles/file/90195350238.pdfIn PDF document text
    • https://centrorevisionimonregalese.it/file/muguwikapim.pdfIn PDF document text
    • http://oletrans.sk/editor_uploads/files/71210000005.pdfIn PDF document text
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/xukirawezalidiremifago.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/dosogisazu.pdfIn PDF document text
    • http://moiarchitekci.pl/pliki/file/54128427488.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d362ee4b85---29634238889.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b411352b223---64581480386.pdfIn PDF document text
    • http://gandolfiarchitetti.com/userfiles/files/78350796412.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_off0000e528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE528 11104 bytes
SHA-256: 88893470221604fbecf12b519ea059370bea3d170226d5d74822ae16a4e2ab37
font_01_sfnt_off0000feb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C3 18704 bytes
SHA-256: 5c2eba5531d547b2eb7e75d2f5a04317edf880500d5d2b062cb860ed3e325764

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