Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c94768f090d5fb3…

MALICIOUS

PDF

82.6 KB Created: 2021-09-21 00:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d86e260ebb805536209fda4b32a30ee4 SHA-1: 17b557c43ab40aaea0ff252fef15053848806c70 SHA-256: 9c94768f090d5fb3a477750c4082cd2f9c3656b23a302c1b5015c04b1c0e534c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to various domains, some of which are associated with compromised WordPress uploads or disposable hosting. One prominent URL suggests a lure for 'rome total war 2 apk', indicating a phishing or social engineering attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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://chcial.ru/uplcv?utm_term=rome+total+war+2+apk PDF link annotation
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/18969594863.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/31247187573.pdfIn PDF document text
    • https://red-adlay.com/upload/files/suvux.pdfIn PDF document text
    • https://073741256.com/uploads/files/202109031726405722.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/xogorogirurajan.pdfIn PDF document text
    • https://biocenfis.es/uploads/assets/file/sebeburewuwu.pdfIn PDF document text
    • http://stluciachamber.org/uploadedImages/contentImg/file/selesijimujunafu.pdfIn PDF document text
    • http://mobiliteit.nu/files/kesenixetutowize.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/duwofujadamigejumuvole.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/pawidawivejewajemi.pdfIn PDF document text
    • http://cp-1.ru/userfiles/files/kuvomudebatised.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f8cc1a5a9---3633832059.pdfIn PDF document text
    • http://videocycling.info/files/file/51920950099.pdfIn PDF document text
    • http://2222.netsociality.com/upload/files/62916851514.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161408bed831eb---nuxepa.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/69300419518.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161467638552b5---ferafim.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/40343655610.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/kojob.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/70522021369.pdfIn PDF document text
    • http://massintech.ru/img/outer/files/20869048224.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/magepamedokedebabobibivo.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372f47a6d19---71243737607.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/6603558652.pdfIn PDF document text
    • https://ocw.tw/uploads/files/vapefomuxaz.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612eac151ce0f---54246420818.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB40 21736 bytes
SHA-256: c09d1ae228bc8c66e15aea49093d52d446788564ba4bf101468f492fe166d063
font_01_sfnt_off000101f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F3 10392 bytes
SHA-256: afd83579e7e4205524ccaa4e721a67d6ea37dd1c64ed91aaa86e05cffe6a3d43
font_02_sfnt_off000119a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000131af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131AF 1868 bytes
SHA-256: b44e304f4199d162c520aa61e4565b27969aa952fa2ee1db3f4cf671ae1a9eb8

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