Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca6570a653015b5…

MALICIOUS

PDF

90.0 KB Created: 2021-08-21 03:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 94b82664f2d5e6a97bfc14b787fb7646 SHA-1: 77740a8a9d6c06a10374ee4f74e5b9ef950827f5 SHA-256: 7ca6570a653015b5b8117e31774b1bbb19d661a3d9592756151559cc902fa2b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting. This behavior is characteristic of a link farm designed to distribute malicious content or phish users. While no scripts were directly extracted, the PDF structure and URL patterns strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://kryotherapie.net/neu/userfiles/file/14268288561.pdf In PDF document text
    • http://e-sportis.com/images/upload/fakep.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/6aedb55262f8b4675abfe9af1ab3ef9e/gituxenatefilazo.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608739cd85539---88001813150.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/cc6d939d9d490d0a023e02cdec24c0e6/45242423575.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/173f998cb9294813719a78e4209b1b41/40400315265.pdfIn PDF document text
    • https://wsbtitan.com/images/file/36229197929.pdfIn PDF document text
    • https://zapret-rf.org/web/img/podborky/files/gebigojuxir.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a0dbe47aa0f---virofejiwojesubutirasevob.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/segagomevezenefi.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/melumukijalimew.pdfIn PDF document text
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/74150624726.pdfIn PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/86810183678.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6ac1a6d85---38734867006.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/19346779237.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/273cee75df7c323bddfec1b133117ab4/medagudafobij.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/75669472065.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b48e457ac7---60080587481.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/4qf4ql4gc93ejt7bmhahfkkr86/viwivodenaribajemekifeped.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882ed77829d---xezisigej.pdfIn PDF document text
    • http://transcash.com/ci/userfiles/files/96550006264.pdfIn PDF document text
    • https://grafconsulting.pl/Upload/file/mevotoverevigidav.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/38706435762.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=ultimate+car+driving+simulator+mod+apk+happymodPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D2 18668 bytes
SHA-256: fdd7257a1a9fd1d1605cc139c671fcd6ebd85f344743ba2d4bba3fee38400cdd
font_01_sfnt_off00011021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11021 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12832 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_03_sfnt_off00013d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D78 11340 bytes
SHA-256: ea186fa74475c92345de56f34751120eb5e95d5b55dd5f285663bf852eb92a83