Malicious PDF — malware analysis report

Static analysis result for SHA-256 abdfa9fa7ae17ac1…

MALICIOUS

PDF

68.5 KB Created: 2021-06-20 05:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 502c91207398e2fb5c0ea2b832134800 SHA-1: 6362241a744170f0a3bc04f9b2da3d9d7d4b5841 SHA-256: abdfa9fa7ae17ac17668ba74baac06457dbc2d61059f991298b79dc2c9978704
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely intended to redirect users to malicious content or phishing pages. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to obscure the final destination and potentially engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9749

Heuristics 5

  • 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
  • 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.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160969d783b622---96112033960.pdf In PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608743d39a037---28160689910.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098be4ecf754---20396440978.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6bc12c2f3---60393681111.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/6gjmmtu82ck150uhr9n1gpgiq2/67379351632.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a935913d51f---58601636327.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a7680df21a0---wofoluzikidopurujineneme.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab951c4989---nolokop.pdfIn PDF document text
    • https://silga.ca/userfiles/file/50147278373.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/venukidanori.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/papaxudojujevuworekuju.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/1hoj88goc3ljbdiejnkir1q0l4/72655499632.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae8962173a---duwotonebovokukovaviwo.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/716ed139f23343533e7b04227448430a/19776407773.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8caae344b6---87812489387.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/67489980696.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/06784e15ecda4c8f5c724502c785dc6d/67661811477.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/51047852991.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=nightcore+bad+boy+mp3+downloadPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/lgpl.htmlRegularDanhHongIn PDF document text
    • http://www.geocities.com/dnhhngIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE89 3596 bytes
SHA-256: f8e95e70a862d652e823b8f7c0cdd433e3e6194df9ffac07e79f899dde0a95ca
font_01_sfnt_off0000cb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB86 5776 bytes
SHA-256: 8227e8006f3a734176ad8e96f9f9a1d3023261a86f364315cf090eb4f7ce3105
font_02_sfnt_off0000df1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1D 7724 bytes
SHA-256: 4477a12829b04c23cfd1803606f4b4229d738f75010eb7dae34eadb8608e12c6
font_03_sfnt_off0000f374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF374 11940 bytes
SHA-256: fc120497b9f39335ec4807fe1271e5b4bfc9477f18f462f56a66f7363262c8d4