Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc1355ad2abb549b…

MALICIOUS

PDF

89.2 KB Created: 2021-09-07 08:28:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e3811d898b48c55f3048c20f047372ac SHA-1: 09fb79009c218e1d0c590d4dde54bb3e76914a27 SHA-256: fc1355ad2abb549b4de46192a5279cd405c034ae5a4284b6feb735871a56bf74
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress sites and disposable hosting, likely serving as a distribution point for phishing or malware. The presence of external URIs and link farms suggests an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://oniceh.ru/uplcv?utm_term=convert+pdf+to+ppt+adobe+pro PDF link annotation
    • https://limsurempat.com/contents//files/94376678783.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/raxodisesimaviveguda.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757df0534e1---62063861288.pdfIn PDF document text
    • http://uran-berlin.com/userfiles/file/tadulolunumazimepowe.pdfIn PDF document text
    • https://kompaspt2.com/contents//files/nodikamamof.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612084e5ba18a---bisalitab.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/guxuwopedu.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/50724210909.pdfIn PDF document text
    • https://xn--80aaijzh9b.xn--90ae/documents/file/boturanak.pdfIn PDF document text
    • http://www.hmh.sk/files/articles/file/38244632886.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/8e8b54d01b9531b7412bb5de5d4dff9d/ralikizodiduzugegovera.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f6430cf6a---74186885729.pdfPDF link annotation
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/e93821be8f4251d933b0c8d00279e767/supuluzesi.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/161128cbcdd065---gogumezajazezupomip.pdfIn PDF document text
    • http://sportingfoundation.com/uploads/file/modalowekinuxiromiv.pdfIn PDF document text
    • http://diamondsnspurs.com/clients/12200/File/bubuwirenegetimadivuk.pdfIn PDF document text
    • https://archielectronics.com/userfiles/files/tabepamig.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/pigibarivozazikegi.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160777e5c51cbc---wujudesugameno.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/84a5951fa67e8a06bdc162e8cbc7927d/43461226967.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/68230743958.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_off0000dcb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C9 10424 bytes
SHA-256: d53005bf7ef7082ecf79b47421af3f1028021a9a0c8f2176a2df710d2f3d7dac
font_02_sfnt_off00010c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5B 18468 bytes
SHA-256: c71c0fcea0fc7ed654b390a77e6656d847b94ef84200dfcacb7432323059ad8b
font_03_sfnt_off00013bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BCD 17756 bytes
SHA-256: c219c5e86e4fd8e45a92db56ed9528065ae7aef448cc038cb9465566218da35c

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