Malicious PDF — malware analysis report

Static analysis result for SHA-256 80beea4d7e58cbe3…

MALICIOUS

PDF

70.3 KB Created: 2021-09-01 01:37:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 42a2f6634cff6bbcc3030e19a5df0743 SHA-1: d7351a2b78badc7315469016e8621476ab8abf48 SHA-256: 80beea4d7e58cbe305c4b196bec16a0d59b02026edb5109515184e946ceb01aa
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to obscure the final destination. Heuristics indicate these links are used for phishing or malware distribution, with ClamAV specifically flagging it as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • 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
  • 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://artasedanasingaraja.com/uploadfck/file/87735698168.pdf In PDF document text
    • http://shopcloud.cloud//ckfinder/userfiles/files/34219892068.pdfIn PDF document text
    • http://inercial.es/uploads/files/vojojeregufidafovosori.pdfIn PDF document text
    • https://ccskin.com/geektic/files/ziboxototupetogagowobidi.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/76175901215.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/66394220635.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/witodonuw.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/3nvffs22np31fng96aa5l8ttdo/3415840770.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b536c6471---binumokidoxu.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072d2f612911---wilemenabumufotoda.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070aa923474d---67133790770.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/pajerusupaxoresiruk.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/94796534814.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dba0d75d6c---18709539177.pdfIn PDF document text
    • https://hongmao.tw/uploads//files/202108101243528772.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e9bdd14ac---72470642055.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/fukinitav.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8dc209bf4---fudewodorituligubomiredum.pdfIn PDF document text
    • http://vividconcept.in/userfiles/file/36787539885.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16079746fc39c4---miver.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/2021771716554172.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021062014462770554.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/vlll7d8j5p3m2ki9h029qk971d/lidiruxiwapefawisojesub.pdfIn PDF document text
    • http://csc-0898.com/userfiles/file/20210725211836_pn6wup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=los+angeles+county+assumed+name+searchPDF 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_off0000b5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5DE 14636 bytes
SHA-256: 0088971effe6a74228b69b1201cc1087d10d012b72fdf664c3a74778dea7edf3
font_01_sfnt_off0000da76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28D 10896 bytes
SHA-256: 14f2125a300b9d884f380ea1e4ac7040a9c9897a7c42c94b02e3906978084bf2

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