Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a7e2aec0474647b…

MALICIOUS

PDF

79.6 KB Created: 2021-07-09 16:35:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 5f2cbcc11c9a7f85d76241661a23a350 SHA-1: e4079891e4c97581854bbe4b9270bd4563e1346d SHA-256: 0a7e2aec0474647b982d657fd5a234b4788a33a9fe0a1ce9d90a5448f5c6a4f9
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites and disposable hosting domains, indicating a link farm designed to redirect users. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing or trojan variant. The presence of multiple external URIs and link farms suggests an attempt to lure users to malicious content, likely as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2f10a4aed---79798303757.pdf In PDF document text
    • http://ankurgroups.com/userfiles/file/fomabewaviguwapi.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9c6c3ed61---guluzatazalosuzowusiju.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/9b84872703f97b519f0350c962586c05/54111210273.pdfIn PDF document text
    • http://splogservice.ru/content/file/58124027976.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9ff0ba1c2---71885147312.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/63724942903.pdfIn PDF document text
    • http://uniquestatues.com/clients/9/91/91c6e204ee4529d3b478b0717040545d/File/23631859790.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1752916d9---61396671675.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/42253232947.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8c7c14b4e---fazigezavatikoze.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16074a4d496408---48710455854.pdfIn PDF document text
    • http://a2designbg.com/userfiles/file/panovojafofirukixaro.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/pekamerixodugo.pdfIn PDF document text
    • https://airshow-bg.com/file/86090843595.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/386cdb6c89404f073a06ea130a093d68/tenefi.pdfIn PDF document text
    • https://moolans.com/uploads/files/wivifutirotus.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/dudatejelesuxusi.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/63193526215.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/aae64d1cf2376c6672268271fa48205f/35044060501.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2110958778---lidamaduvoxidavuniw.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/25912641818.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c58ae958bfe---5694655672.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b6e17e09d---bijolubifep.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/fb438f40f82eb2643c67e618383d3831/6509376574.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/jefunitewuwazewu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=english+to+tamil+dictionary+free+download+full+version+pdfPDF 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_off0000d1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F0 11416 bytes
SHA-256: d03b95706d6a42cc040de0c782d524968d1f652ae153ec44c6fc49f82ddab1bd
font_01_sfnt_off0000ec8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001049d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049D 16856 bytes
SHA-256: 07a1dfbf7affbe6da1e953cdef2e502945d968b8b4049686b1a2db3c2bc9fe14

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