Malicious PDF — malware analysis report

Static analysis result for SHA-256 a100e62324f59f9b…

MALICIOUS

PDF

98.8 KB Created: 2021-06-26 00:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 37f8bfc8c393113fdaf4ef50cf55e344 SHA-1: 3a27b1ea9ba35616d23007e617d45939699aae93 SHA-256: a100e62324f59f9be0c0b727cec37deebe3a9c249262c3ece3f1a950548b6eaf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics and link farm indicators strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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=touch+me+once+touch+me+twice+lyrics
    • http://incucinaconalberta.com/userfiles/files/87995872647.pdf
    • https://travelsafeway.com/userfiles/file/dewadabenep.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/e716056099dc86535e5a4b63405d1049/47463749954.pdf
    • https://unibel.pl/pliki/upload/file/zaduxokasomoduvorow.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160752342f414c---75613361625.pdf
    • http://lhsclassof68.com/clients/73441/File/11187718978.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b09db3ffe---54443455723.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/80a68976ae8f164e515fb76f267fd485/18470211921.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d23c4617f45---27086668735.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/e98e35f8ba4023e612f1b173e6ed888a/24680498673.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/ed8f33b8033d102155dccf7565b53467/33323944415.pdf
    • http://seoulsquare.com/userfiles/file/4411733665.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f246061f35---84450436827.pdf
    • https://chpcentre.com/files/file/36352917690.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a467ecda46f---37481238710.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/b9tgnik1ptd8rdgg079qsmcbf1/tuwumukokixo.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/506fa93650136f5ae305d4eca1596074/dokaverulexokejosolur.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607246d9c6532---rowawosisajigim.pdf
    • http://kashima.cc/userfiles/file/29035483407.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab85be6e8d2---kivubegigoxi.pdf
    • http://karthikeyanjayaram.com/userfiles/file/90743270374.pdf
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/h4e0i3dvrnd5cnedetjjnbvo20/poxovepona.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_off00012139.bin
b15f112abea224f4b89c3fda7707ddb22fdcd01e2d784c72a4339cc1a77dade7
pdf-font-stream PDF embedded font (sfnt) at offset 0x12139 10596 bytes
font_01_sfnt_off00013955.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13955 16792 bytes
font_02_sfnt_off00015167.bin
deed2bd4a44bf045511b0b1403a8a4a12a2ac76fff690c7cb5ef7f7d9b0cba9d
pdf-font-stream PDF embedded font (sfnt) at offset 0x15167 17408 bytes