Malicious PDF — malware analysis report

Static analysis result for SHA-256 0deba48520ddafa7…

MALICIOUS

PDF

78.8 KB Created: 2021-08-02 03:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0489419a5f109c215be2db85ef6a290e SHA-1: 0b7734b09d5ae538706438acff3ff9c2d6479aa9 SHA-256: 0deba48520ddafa742fbaa4594780258339577c8da61df03aca73bbf7d80afb0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links are indicative of a spearphishing attachment used to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • 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 http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cf62d788d3b---5036939537.pdf In PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/d15c38c010d34a994f23fd9558b17ec8/rurerepirezezagukiwofug.pdfIn PDF document text
    • http://envigest.cz/upload/file/pudixiwesuv.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210726113421.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160a0676182dad---59360733515.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906f2aef450---85886997394.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/828ab507b3816b8bf967f26c1f2d9035/22283297836.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/ranegok.pdfIn PDF document text
    • https://toliveinchristjesus.ceosale.catholic.edu.au/application/third_party/ckfinder/userfiles/files/kaboxosavexejegebafanoko.pdfIn PDF document text
    • http://csc0311.com/userfiles/file/20210723080447_u3n1m0.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/59829666860.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baccc95838f---16789022506.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/83004561148.pdfIn PDF document text
    • http://w-mill.jp/images/file/juxavinewu.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/aqlsuvlko2k3l0mun4k4jt66nn/78628653048.pdfIn PDF document text
    • http://starrsgazette.com/admin/images/file/19346190234.pdfIn PDF document text
    • https://avenue102.com/uploads/file/7346674304.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160806ef54fe4a---35388240047.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/14014452385.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/99396080010.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609282d15d7a3---zenimud.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/2c93e53063b14a0599193d8aa4aefa83/98837233110.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b6363b493e9---xidoboreguwulowaxelob.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16107258cb74d9---rigexiluzuva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+put+a+bagger+on+a+john+deere+lawn+mowerPDF 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_off0000d19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19E 16688 bytes
SHA-256: a26b238449b1ca6396432251dce9fc4b3031e87d7939351ece313e7b55ab2f07
font_01_sfnt_off0000fc9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9D 11024 bytes
SHA-256: 352e1d452c80872fe802d994a01cb6302706a18d9135cf9a661be5904ef78cf7
font_02_sfnt_off000115a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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