Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc6e001760abc6f…

MALICIOUS

PDF

84.3 KB Created: 2021-07-04 13:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 2060008c1f5899a48023875ad93eed26 SHA-1: a55f3d4a869dd080ac829e6b26c41161c64a8d18 SHA-256: 5fc6e001760abc6f0edfcf7b311e827c8f50db5dd40415907a2725e618dfda16
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous URLs hosted on compromised CMS uploads and disposable domains. These links likely serve as redirects for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://pistant.ru/uplcv?utm_term=what+does+sunnah+mean+in+english PDF link annotation
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/g7q54i2016fqdashorf5n1uhr4/68029964518.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c974b99e99---52515539866.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cde36466591---bajilumizo.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/pelusezibananaguxek.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/42b25ba31b342a36834c8924ff9b5067/97932422280.pdfIn PDF document text
    • https://maryamghiasi.com/images/upload/files/wupuzedapajinemadasifape.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d35bd9c27---7186807455.pdfIn PDF document text
    • http://arslanemlak.come/file/kudima.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607d183f655ae---96007542685.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/f288c0bd7d42460c47e8287c015a03c8/manekofijizakezutaka.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/naxenek.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/96616356540.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6454b5f35---nemajuzudinawazida.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/84950625660.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/8c381937f5fb8471fc1b795eb5a697a9/jaxemovadobazoropifenu.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/pedipewawezexusuwofapaj.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d18ccefb1c---tinagonekarin.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/denunatiweturewedepix.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/38292308030.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/99614133954.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/74116be5474b1cba008a43b0f1adb9f9/70198425452.pdfIn PDF document text
    • http://hanleyresources.com/images/2827382341.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA54 17776 bytes
SHA-256: 064d02af26ab812bf8f016611c6f1440c5ee52f4ff6a9301c74f9c9c2906b145
font_01_sfnt_off0000f958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF958 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11169 17300 bytes
SHA-256: ebdd183219a8ac16b623afbec6c25e0cbb43ae197aa98f1d5bcc8820c5ea9e7a
font_03_sfnt_off00012b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B61 10688 bytes
SHA-256: a3b25e9a53ee3e1f7e246e34028b5a001e441675bec3d691d65493f8b4762390

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