Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c63823d3ba94d4…

MALICIOUS

PDF

95.1 KB Created: 2021-06-11 13:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a80bef648f82815c14068983b362e08d SHA-1: 3b2e3fdcb5e549fae33c667c88666fafa2bd41c8 SHA-256: 49c63823d3ba94d4aec4baa74c6b7f22f892bc337fe3c1413a626232d070fef0
156 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs that point to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and appears to contain metadata related to its generation rather than user-facing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://crysiq.ru/uplcv?utm_term=fyngeez+amharic+keyboard+for+pc PDF link annotation
    • https://t2sc.me/userfiles/32708678701.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ffafde0ed---73759648405.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/h8gvinocaq0muo253kfu22bfbi/23462172181.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/kuzofarolawofaxakix.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/c76c5e5ae31f974b34368e393cecd07c/bawemadis.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/be17826204971431cc0ae1e40528abf8/tabuzabagizunaresir.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/84734211606.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc98d3447e8---84053092518.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/37643920565.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/40012969162.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d2d441f57---58573011173.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e002bb421c---41293251359.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ca191e725---34491850645.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075876b9f07e---zilaxuna.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087299c74c22---50090057050.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE690 17220 bytes
SHA-256: 9a320685ade3f29e6d1448a3e1e11f9e3207aa0e7f640a3b7e270e06f9392f67
font_01_sfnt_off00011492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11492 5668 bytes
SHA-256: f907517f3bf64d22bc4f7589c9988cca159b01953736fb78d1a5d99966edc0eb
font_02_sfnt_off000127c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C8 2816 bytes
SHA-256: 8a648fcecc7c69245eecaedbc37c346cbd266dc885a51a4dd41af06021252dcb
font_03_sfnt_off00013196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13196 11056 bytes
SHA-256: 5d61f81ef3ff28b6dd69f56c7e800676b1f6116d3a53b119c149ac7a1a2a3632
font_04_sfnt_off0001579c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1579C 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

Open this report in the interactive analyzer, or submit your own file for analysis.