Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac6637940b7a0eb4…

MALICIOUS

PDF

82.1 KB Created: 2021-07-14 10:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e0d9cab5460db3a2bf35a7a68013e56b SHA-1: eaeec37f1303bee622514e08275e7bb767eaacd0 SHA-256: ac6637940b7a0eb4c3376450d7e110e437d54450d8c551e8cca6e7adb8996973
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 http://jrmhandling.nl/upload/file/boxezizosatesafes.pdf In PDF document text
    • http://murielbellhomes.com/userfiles/files/48953903118.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/iuit83qkchs3qi8h9c88049mp7/muxigubew.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bcc07ce06---91865174905.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/55564c1d0841ec0e6bcf51e0420291ea/musevilevili.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/gudapo.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16091c075db0f5---texexuwosewamig.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/85fb81d576cae943db6773b893ac00ca/sewajofulifizamuz.pdfIn PDF document text
    • http://xtra360.net/campannas/file/neragizanikapilomegip.pdfIn PDF document text
    • http://lowdertraviscoats.com/clients/7/74/74ec8bd2877f4db8d0b9f56bae0111c3/File/witebibegurobevod.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/86017976452.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/5c5ebb9ce7be0fd92ccf820a981800ec/xoponobizenarijajanojamo.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/28e928ccfd5500fe122c0b7758013fea/59996028447.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/b166e7458282f35fea6c9b54a5a5ed59/8962453859.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/5556999110.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/7jrp8h13ltqilqu179o6bvf6nc/13124806364.pdfIn PDF document text
    • http://1960vonsteuben.com/clients/d/df/dfb5e1b83ea85bfdc5ef1da934264264/File/49506330823.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/af6f04461f790f2d04cdeaad60d937f7/10856498540.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1bbbe8b38---masatodesipokiperawaso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=itunes+gift+card+balance+phone+numberPDF 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_off0000dd0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51C 16960 bytes
SHA-256: 1eb5cc96ba6a76627f9eebd0a7790f2d0cce25ae9e99fc64a0a6ef9b766a5e96
font_02_sfnt_off000121a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A9 11256 bytes
SHA-256: 20d07f0b2fc6a751478130260205132df7ee92f48b1b7046be5ab0d468c66e41

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