Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f6282712978ec1…

MALICIOUS

PDF

96.0 KB Created: 2021-08-05 09:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 4b61aecee7854962373e0edafcaf0c86 SHA-1: b2f0bb87393ff8003548b08258a2204c2bed7b9c SHA-256: 07f6282712978ec1334420c3c5f9a1be4a7e213d2a607c8ad4581fabf49b1377
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised CMS upload directories and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure itself does not contain readable content, but the heuristics strongly indicate it's a lure to external, potentially malicious, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://reutlinger.pl/userfiles/file/wetojopopiwatigevudiju.pdf In PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607279019daaa---nusonerori.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/25116944077.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fbdd934c472---46744883388.pdfIn PDF document text
    • http://tatishev.ru/admin/ckfinder/userfiles/files/jefogexuxitar.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/trn58ttss7fcchbcdirmg2l1gn/67416851424.pdfIn PDF document text
    • http://gabortech.comadmin/file/85766727137.pdfIn PDF document text
    • http://ithaca1962.com/clients/41687/File/86072501878.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/j5dqcn3snln3rchqug7t8m8dsc/6283209408.pdfIn PDF document text
    • https://nabil-doukali.com/userfiles/file/91123126627.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/69904777276.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/dubamutamijes.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/19762936615.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160943fbbdad36---widonidixudezojifozelaw.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/q1t8k7rmq9sl9me76nlupqcrbn/90526441516.pdfIn PDF document text
    • http://wsm.hk/images/files/jolizufidelivedefa.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/a4ea494b8eb5b37b650ee5affb6b4815/wimijuzajasexafiwara.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/82821344758.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/rawedemaxid.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7766e09f3d---6351315875.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/jfo60qf79m997fi2asl5sqnrf4/nigudidanajewoletun.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/ae21c298463e476becca759beca90756/18401792270.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f61423fb8---33266538413.pdfIn PDF document text
    • http://abc-tel.ru/data/File/sakiwa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=resumen+diario+de+motocicletaPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11001 18552 bytes
SHA-256: 16b91c6cd4f8979b31d227307741b63bf21cae3b931d8aa0406958a0640a234c
font_01_sfnt_off00013f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000157b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157B2 10676 bytes
SHA-256: 904cb6175fdbb517ec612e19e71be05cdff9cfa12f355218973cde681b575e6f

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