Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b482241eac0e27…

MALICIOUS

PDF

77.2 KB Created: 2021-09-06 16:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 02a19dc4e403f733bc599c940dc3abd4 SHA-1: 1e5382ba1bd478d25cc2a9cfc30e361535a20a71 SHA-256: e2b482241eac0e276dcda374e0d4ce80945709090d82d0345d4ddd5eedcb7192
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded URLs pointing to compromised WordPress sites and other domains, suggesting a phishing or malware distribution attempt. The presence of a 'link farm' heuristic and ClamAV detection further supports its malicious nature. While no scripts were directly extracted, the document's structure and embedded links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://laborke.ru/uplcv?utm_term=aiag+apqp+manual+4th+edition PDF link annotation
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160923fe8eb096---wevesikamugazalulusaboku.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9d10d6e20---zuzokagekojaxaretonidilo.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/62841680888.pdfIn PDF document text
    • https://pmms-online.com/assets/file/29256131380.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6bfef1a34---sunigusa.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/2715255c39d9eb75cb74aecd44b926ca/88726654250.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d7ff6d4ba---50783136393.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ac3dbd252.pdfIn PDF document text
    • https://airbays.com/userfiles/file/vozutifemoge.pdfIn PDF document text
    • http://slippersymposium.com/clients/875641/File/tofilamemosepuvupimosu.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/10943641624.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3875c9ca72---vekezafaxiwolat.pdfIn PDF document text
    • http://candientushinko.com/images/file/nasisinifakogasewewovi.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/nivubunibamujal.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/guverotexisa.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a90c69f09f2---87979211759.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/htbeja1sd3j2caumiqo3k2m1h7/5573939406.pdfIn PDF document text
    • http://doingthing.com/downloads/blog/geust/files/gujokisodoboxibatatagoxu.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d45acb18d6---kivivulal.pdfIn PDF document text
    • http://shbaicun.com/userfiles/file/2021072613432373499.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a69850e16---58951894451.pdfIn PDF document text
    • https://luminex.pl/upload/file/46251535600.pdfIn PDF document text
    • 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_off0000ca64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27B 10876 bytes
SHA-256: 09184efc21c0d0bc87972783a6b0c6fcb32a32bb1f642cf4507a96cfd3911f4a
font_02_sfnt_off0000fae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE0 17240 bytes
SHA-256: 148013f0a5edec5fd3f9faaeaaa1f84e8350f8d65884290febe6e16f0c1fe3d7

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