Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7518206fd02818c…

MALICIOUS

PDF

83.1 KB Created: 2021-09-06 21:03:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 096712b6975259ef0e77605a3d182f9d SHA-1: ff2fd98282534c76d1fcdc22479ea9345fba8b50 SHA-256: f7518206fd02818c2641797edf010160a1fc2d136c3640af9f1c00f84cdc586d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting it functions as a link farm to distribute further malicious content. The presence of external URIs and compromised CMS upload links strongly implies a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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=metrel+eurotest+easi+manual PDF link annotation
    • http://jadever.vn/Images_upload/files/65143380647.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160806b47919f4---7914674394.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7555a04a77---gorujadaliwezusezi.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/jafawusubinukutejo.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/buxej.pdfIn PDF document text
    • http://jjkxmy.com/upload/files/202106290146393913.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/irvikt2p4ibf20s24b9fv797cv/xobat.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/b7b441bbcec36998658341130c581484/fokiferesobi.pdfIn PDF document text
    • http://gtshotel.it/images/file/vokatux.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/smt7ltb9ugge3pntnugdjfvla7/pipefit.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/43702701711.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/95053678743.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/navuwiga.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/vcjlbc7pp0elnagtvika90p1n0/munopavaxis.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/b215af6146e6dcae4224511bdffbc732/resofazojewunetugavi.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/godozunoniruwafup.pdfIn PDF document text
    • https://biographiewerkstatt-singer.de/userfiles/file/24916302237.pdfIn PDF document text
    • http://rfamilylucas.com/clients/73238/File/94625932350.pdfIn PDF document text
    • https://icrs-as.com/userfiles/file/49468740905.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/9767230120.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070d9e1de4dd---ribuvuvamib.pdfIn PDF document text
    • https://shopabrang.com/images/files/sizigoxix.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EF 21500 bytes
SHA-256: 2fc1c16cf51127cf60a188d1a16743e986453c3fd8491ced78627aa7bad1b6d2
font_01_sfnt_off00010f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001273a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273A 10364 bytes
SHA-256: 610d947fa27843cde2e54349af0fd55a7b483ccd2b15c3cecf8ad1c378308619

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