Malicious PDF — malware analysis report

Static analysis result for SHA-256 d27fcc82c9ad6129…

MALICIOUS

PDF

82.9 KB Created: 2021-07-01 15:00:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6c7f057e4ae7198a740379d9d2ff9e06 SHA-1: ddf47f8305dfaaec4a41d8f64fb33e57bbb7d5f7 SHA-256: d27fcc82c9ad61295301bb6c210e16d669a851f651e936f0fbcc3254259dc8c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous external URIs and link farm patterns, indicating an attempt to redirect users to compromised websites. The presence of multiple links hosted on compromised CMS upload directories suggests a distribution mechanism for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://drafthe.ru/uplcv?utm_term=cat+low+meow
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/uod9c6sq8h6fe4q2ftrak7s6e1/sozaxizolu.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/6534606c97a294ad3db0e0c5e5521362/zunojege.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1606f22b3e3201---rejosutapudupinesidikator.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/5v9oq54na7pglrhknm7bfjpn55/defebebopaxisazukararo.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8dfcda8d3---wumuvinixizodujem.pdf
    • http://kppzp.pl/userfiles/file/66286448347.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/cno5g14idtn2pc2mo7tec033q6/31111374188.pdf
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081e1f776fb9---nunegobibidokopisawim.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cf06fc76c72---bosexitusuj.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080206558563---lofifedun.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/22159135931.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/cp29aj308rc66b816bi80ieoop/burewogada.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcea627717---buwivo.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/78d3952142cb1f7954c8530fe5773ef3/69278660796.pdf
    • https://avvocatoboretti.it/file/40621724789.pdf
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/a4c0d29c5d335ce7fe45c373a3ece70e/zigeg.pdf
    • http://kiddeefire.com/media/userfiles/files/libabomokafurejamate.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/gg9emltongfrhkfgu7nu1ikrcr/45526949399.pdf
    • http://melly-incendie.fr/img_db/xegepizu.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813bd92cb52.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e708.bin
482c429e7a4a1a89f34b9d9a09010290ea0d7948469d42f4f03dce64fd701b85
pdf-font-stream PDF embedded font (sfnt) at offset 0xE708 9924 bytes
font_01_sfnt_off0000fd17.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD17 16792 bytes
font_02_sfnt_off00011529.bin
b6356be26c2f8209fad2a939b8cae331fec777fd0c83776da62f5e68ab4a8357
pdf-font-stream PDF embedded font (sfnt) at offset 0x11529 16480 bytes