Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ec0d0c8cdec50cf…

MALICIOUS

PDF

81.7 KB Created: 2021-09-10 09:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f1a6c9c160cf8052409344a451498352 SHA-1: 947e580e13656bdc605a148ebdc33a6eefe183f6 SHA-256: 5ec0d0c8cdec50cfc3c42984c15451d5287fe1e7f52f55e715586155366baa2a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and multiple external URIs, many of which point to compromised websites or disposable hosting. The heuristics indicate a link farm designed to direct users to potentially malicious content, with ClamAV identifying it as a phishing trojan. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://wastran.ru/uplcv?utm_term=wwe+supercard+mod+apk+2021 PDF link annotation
    • http://duplisite.com/userfiles/file/wunilu.pdfIn PDF document text
    • http://metrominicabs.com/survey/userfiles/files/60307604850.pdfIn PDF document text
    • http://bananamusic.tw/uploads/files/202109030827344602.pdfIn PDF document text
    • https://bonvoyageindia.in/ckfinder/userfiles/files/55317918845.pdfIn PDF document text
    • https://www.lipca.com/ckfinder/userfiles/files/lubawitibatu.pdfIn PDF document text
    • http://miyozenemeryville.com/uploads/files/77641469845.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/67495662084.pdfIn PDF document text
    • http://espaciocultivarte.com/ckfinder/userfiles/files/dijelake.pdfIn PDF document text
    • http://norrlandet.se/userfiles/file/vasevuborodokupivanodu.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/14690873383.pdfIn PDF document text
    • https://barcelona-health.com/files/galeria/files/mimapuk.pdfIn PDF document text
    • http://anindecor.pl/files/file/5566231071.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/9086949553.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16136e727ab30f---weloxosas.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/5cb82557b3a57dcb7377c7d2cbb3054c/luduromadezufi.pdfIn PDF document text
    • http://kurumakaitori-one.com/js/upload/files/94915994847.pdfIn PDF document text
    • http://chromavials.com/d/files/sifelamusagutux.pdfIn PDF document text
    • http://spbi.cz/res/file/bevuvewutaw.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/zibunamatezugevij.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/61547853526.pdfIn PDF document text
    • https://saglamahsapkutu.com/img/editor/image/file/vebewitovap.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/1jrhcbpr8hdo9u5gpg2inq2e9c/5688200383.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/tagabopetugoluwe.pdfIn PDF document text
    • https://psychotherapie-coeppicus.ch/userfiles/files/zenimatujevexolesumes.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_off0000d84a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05C 18204 bytes
SHA-256: 05da76aa21843bca9d9f69c8e5b747f8597df703b5594bb1bfbc5c6bb1928c60
font_02_sfnt_off0001204f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1204F 10900 bytes
SHA-256: 05a12510a13726ce4bf6d850cef3efc5fe3878cad670856f9d302a3a627324ee

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