Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe6f50d7c20b52e…

MALICIOUS

PDF

78.3 KB Created: 2021-09-12 02:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 9a85e3a7b23474ed595c17f8e8628645 SHA-1: 9365a0f77cc1253d2e6bd6ada55d2f13d61c5068 SHA-256: abe6f50d7c20b52e16c5502340b73478f2723df0da71d65717748459efa32f71
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a QR-code lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://vico-real-estate.com/ckfinder/userfiles/files/wewadujeranusivunadag.pdf In PDF document text
    • https://kampusogrenciyurdu.com/file/ruxemegirufupotiw.pdfIn PDF document text
    • https://activsport.ro/userfiles/file/jagebirumukefitilezo.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/83941822652.pdfIn PDF document text
    • http://skncn.com/u/files/63300840275.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/ecf2e945ada4a842f8adee0b0ea1fa2d/woganavuvolusom.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/zigubikefiziv.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/fekadigazaxowilitelova.pdfIn PDF document text
    • https://vpmemorial.net/images/file/petet.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/28762551195.pdfIn PDF document text
    • http://liweisteel.co.th/ckfinder/userfiles/files/93571316974.pdfIn PDF document text
    • http://climacom.eu/userfiles/files/gipamipitokanulisid.pdfIn PDF document text
    • http://goldia.cz/data/file/1445335328.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/elbrutscqrmauoea09rdt9rno6/pufoxaruvawepitivulemomef.pdfIn PDF document text
    • http://sdes.in/uploads/84971218720.pdfIn PDF document text
    • http://faithleader.org/js/ckfinder/userfiles/files/15521490230.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/7319664274.pdfIn PDF document text
    • http://nissanotogovap.net/uploads/images/files/73945070192.pdfIn PDF document text
    • http://popmetre.com/news/files/lumakajobeguvekurub.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/nudedidunodajumovuzana.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/856b79cfe4e16b1a548032a3435ebaab/dusikagowitem.pdfIn PDF document text
    • http://papienbanana.com/user_file/file/49729473201.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/gerosejikumomi.pdfIn PDF document text
    • https://khonggiansangtao.com/platformecom/img/upload/file/memutimofoforobis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=among+us+download+pc+free+downloadPDF 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_off0000cef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE704 16788 bytes
SHA-256: 066b685347820e97ea81f7e47dd8e3af7d149186d9b42721354701dcf0fd05fe
font_02_sfnt_off00011220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11220 10940 bytes
SHA-256: 43d14a2e70d6e13c29fac64ec500d05fa42cce3bea3d0242ff1b087b2a7f51de

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