Malicious PDF — malware analysis report

Static analysis result for SHA-256 059ee11dc87313df…

MALICIOUS

PDF

69.8 KB Created: 2021-09-27 16:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bd95844469a310289aa01f8d6d4a9560 SHA-1: e48a82bab2346cf6ef3e91207fba2e09a9eaa0bb SHA-256: 059ee11dc87313dfd000db9ce34ec45499cd6d890a34beef2bf182995c7141be
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, including a link farm on disposable hosting, suggesting it is designed to redirect users to potentially harmful websites. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://laborke.ru/uplcv?utm_term=dragon+ball+awakening+apk+download PDF link annotation
    • http://hanarotalk.com/userfiles/file///niripubuma.pdfIn PDF document text
    • http://gameometria.com/assets/ckfinder/core/connector/php/uploads/files/84796642650.pdfIn PDF document text
    • https://krossi.ru/images/content/files/92851407525.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136eb7df0f2e---73848116397.pdfIn PDF document text
    • https://www.truck-transport.com/ckfinder/userfiles/files/19386357725.pdfIn PDF document text
    • https://galedo.cz/www/data/cms_files/files/36781615830.pdfIn PDF document text
    • http://citysoupsbellevue.com/uploads/files/bazelilefagusegiza.pdfIn PDF document text
    • http://komodovo.ru/upload_picture/74561480642.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16147c79f12b34---gakefubovativurob.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/20191105104.pdfIn PDF document text
    • http://sk4education.com/ckfinder/userfiles/files/17425858570.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/74899815365.pdfIn PDF document text
    • http://vallovin.it/userfiles/files/99577681345.pdfIn PDF document text
    • http://tuecpa.com/file_media/file_image/file/5166458446.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/43351871602.pdfIn PDF document text
    • https://jensbrode.de/files/file/refosoboxobalubolibo.pdfIn PDF document text
    • http://seowonbattery.com/files/fckeditor/file/1149268336134e29c90fde.pdfIn PDF document text
    • http://dongphat.net/upload/files/bupusozetopi.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/fejigofowolop.pdfIn PDF document text
    • http://sakesushilakehavasu.com/uploads/files/kadas.pdfIn PDF document text
    • http://cmtl.in/uploads/userfiles/file/file/mekanodiwetetomugekolikit.pdfIn PDF document text
    • http://tdsns.ru/userfiles/file/gugoduw.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/33083054405.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/3680290354.pdfIn PDF document text
    • https://youkuvpn.com/upload/files/lifodupo.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_off0000b318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB318 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2A 14576 bytes
SHA-256: d5440d6f1f5c73ac3deb7e32e08c340123b1f674862ce39f51e3808ae05fe1ce
font_02_sfnt_off0000ef80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF80 10620 bytes
SHA-256: 05b41adb4a95fc32f3788ce4e2861052f841d622c0a5341921cd625f7846179f