Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d7acb7a8665ee42…

MALICIOUS

PDF

85.7 KB Created: 2021-09-07 12:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 8d228307df8af07d8735f7981d947bf6 SHA-1: 4c4c1a62232cd4ef534c576805043d7304d07c6f SHA-256: 2d7acb7a8665ee42705b267d5d2ed366681aeff3496276b5b36901b7f5d78e3e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics suggest it functions as a link farm, directing users to compromised WordPress upload storage and other disposable hosting sites. The 'SE_CALLBACK_LURE' heuristic indicates the document likely attempts to trick users into calling a phone number under the guise of a billing or security issue, a common tactic in phishing and tech-support scams. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/aa4a7ff47f97a1b0c1a6a635deaebb59/52915794129.pdf In PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a261a53c8b4---judes.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a58a80969d2---xemowigud.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/7e070fc707ca15e867aaa723601059bd/dawofividepopif.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/35923630593.pdfIn PDF document text
    • http://chikatere.com/Upload/files/60117446388.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd396488b5---nosowixedunu.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/f96ecb9786a7aaa4810aeb949d2ae2c3/77357512463.pdfIn PDF document text
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/13495590247.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef48f06b5f---91608004768.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f43638df12---kewelemilajufifozixol.pdfIn PDF document text
    • https://argumentua.com/i/file/49002408981.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/d62e541f6829b35daf919c75e939d749/69120474754.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/kavigu.pdfIn PDF document text
    • https://forthepeoplegov.com/userfiles/file/78062074878.pdfIn PDF document text
    • https://digireg.lu/upload/lovoxixu.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608e79bfd822b---96812780116.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/fidigejakabavedefewapejil.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/52767210437.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608372a5da94a---zidepujikubaduvugakevizi.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070ba3c89d05---32765812271.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe4797c66b---73322360941.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/47fd793e476e03fd7cddba12bda1eca1/79278784784.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/40f1ba8da286f7e5a82326e5e4834e34/88944044883.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=courier+declaration+format+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_off0000e7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FE 10744 bytes
SHA-256: ca2d3bb76118569da02fc9e55315d83ff4008884d8e3519e87dce490a37ef572
font_01_sfnt_off000100ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BE 19052 bytes
SHA-256: 253b43b029c3634c7c3fdbd1e8fdb8a546a6bc1ad9bfd4894f5148fa62bc2d22

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