Malicious PDF — malware analysis report

Static analysis result for SHA-256 be74601f725bd66f…

MALICIOUS

PDF

83.9 KB Created: 2021-07-06 13:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 549b3c5c7a204e8a9e3b5fbc0202446e SHA-1: 03a85f3b8fe44d0e863f0ad09fe0d2dd6358cdd4 SHA-256: be74601f725bd66fb881897718d1a743a82e5341ab6feee6aca98f762a1d9387
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608135535bb88---jabomap.pdf In PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c2032e594df---rorajugupeloki.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/ktj91voqb8o10fcpg4pbjpm7ng/zagifus.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/79561842050.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/lipeleramojuzivi.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/56297467958.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab74e7b3bf1---texadukumod.pdfIn PDF document text
    • http://slsnn.ru/content/files/68939564873.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/768d1cbbb8f70ddb402844ee42a1947d/28265566098.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/c9niikq8r09p93fl7s3i0ij3ge/88718693172.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/jabd2g5oi7ja1e2j0i0rtshhkf/14709912217.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160df30c305532---totonol.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/xilajew.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/19070398367.pdfIn PDF document text
    • http://internationalnetworksolutions.net/files/desaxipefibam.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202106file/2021061213460970554.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0f9d78e15---9028816996.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/nijitivisunaketi.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a924276e013---29212821126.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/793a65250222016005159f5f42894d15/7488435737.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/43f42bf11abd011110639d353e897e9e/jogajujovadizumaxajavex.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/107f64f732174d81dfe55499b5c8015c/gudolimovusuzibinadu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=living+things+and+non+living+things+worksheet+for+grade+1PDF 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_off0000e573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE573 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8A 10888 bytes
SHA-256: e5412c7df6d4ce9f0eabbaff9f5b6bcd0ca96587f08598adffe2f79e26054c7e
font_02_sfnt_off0001168b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168B 16768 bytes
SHA-256: f0398ca961808273296268935caa7ab3ffcfa10a8436bdc89f393c8d82051df5

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