Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0e48d09f6f5994…

MALICIOUS

PDF

74.9 KB Created: 2021-09-25 02:22:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: caac0d92464fb3611d11c18050ca6f4b SHA-1: ae6bff5c8efba31463ad2a4e2801d5b4e27f9948 SHA-256: ea0e48d09f6f59949be014c7ca8c3c301b9459668e30b79ae7b3587a538e953e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to potentially compromised websites, likely intended to lure users into downloading further malicious content or providing sensitive information. The document's structure and embedded links suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 6

  • 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.
  • 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://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/4m5m9sftd4mokkhhnnhvb4846o/bejipukawezil.pdf In PDF document text
    • http://zaun-produzent.de/userfiles/file/depuzolamebuvudexinuva.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/63852936082.pdfIn PDF document text
    • https://angkaganjil.com/contents/files/fopusajoponawejeludemi.pdfIn PDF document text
    • http://allier-genealogie.org/File:/borijelunazip.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/galawifaponajinevaji.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1613593997bef3---44353100527.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/7934847283.pdfIn PDF document text
    • https://kingyao.com/uploadfiles/files/20210920_163743_7934.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/kurofawut.pdfIn PDF document text
    • http://sinhorelli.com/userfiles/file/7151046371.pdfIn PDF document text
    • http://intimatehotelpattaya.com/image/upload/File/jusodebuduweta.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/75561324041.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/11037664743.pdfIn PDF document text
    • https://artinterior.bg/userfiles/file/wapuloporamikaborevazesax.pdfIn PDF document text
    • https://www.premiumtrade.ro/ckfinder/userfiles/files/filibanejobovebowa.pdfIn PDF document text
    • http://gilendor.cz/userfiles/file/kegufeluditenanur.pdfIn PDF document text
    • http://calisnt.com/uploads/files/71373650368.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614be2823662a---xekoz.pdfIn PDF document text
    • http://synowka.pl/galeria/file/bilefetixi.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/pegojepege.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/qpf55g4u061o3pb15ua36bqq75/nevofebebowob.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/silojirizoxeluromipetoda.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/wulajasaxu.pdfIn PDF document text
    • http://sushi-belovo.ru/files/donukuwepifexepavivuxug.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/nudarexepogitu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+set+lock+screen+on+androidPDF link annotation
    • 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_off0000bfb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFB9 17808 bytes
SHA-256: e9cba66cb84ab7220510b8ee28ff3b10464d04f9c94cf42ebb72726bf20b82b6
font_01_sfnt_off0000ed73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001058a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058A 10532 bytes
SHA-256: 2fd775dfd753ba1805cdbb652e855bc0517ec611af4a1b444710b65140d5994f

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