Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc7396f99bada5ab…

MALICIOUS

PDF

88.0 KB Created: 2021-07-15 20:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 22cd8b4a2248c3cd9b9ecfc7a1e6140f SHA-1: 8d78f8adc552b3f59bc2324bdbf32af363e605a9 SHA-256: dc7396f99bada5ab0cca045132673a1c8f073443a399d3a21786546b12485517
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to websites, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://infrive.ru/uplcv?utm_term=biodegradable+and+non+biodegradable+material PDF link annotation
    • http://euro-ex.com/images/blog//file/ribifopuliruvisut.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91505e6b73---9390682999.pdfIn PDF document text
    • https://www.institutvzdelavani.cz/files/borivawiwobebow.pdfIn PDF document text
    • http://beateromer.com/bilder/file/64714607737.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/vajilatekufuvobegoj.pdfIn PDF document text
    • http://crabber81reunion.com/clients/b/b6/b60cf3d631ff247311937b5f15bedc89/File/25849726517.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/6950164145f69fd3f4c1a9b2ac96f5f9/88723879651.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/gadoxulivij.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d0c7b39b0a1---27919317883.pdfIn PDF document text
    • https://ivanamihic.com//files/witaguxufavat.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/24235700583.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c23007219f---70831390391.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/73223094324.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/135a912e9adf49c00d39516bbcaee4ae/53705553013.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210527214500.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/1b721aec1e77fb44af62a03a5324401b/jujasudosofera.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/6d330f400c6da4f53c94b24c2b331bc4/40913068553.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/kexifu.pdfIn PDF document text
    • http://movementlab.dk/userfiles/file/noporedulozikuwufa.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/d83794e6d3bb07dce0ecc53e9e499b21/demotapevanexajisox.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/83823142b64703e415d1f986c88a1d95/jefoniko.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b229ba8e35e---famom.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/04d87eb5697788fb28a93d6428f45ece/dolabe.pdfIn PDF document text
    • https://agermag.ro/mm/file/1986139900.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

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_off0000f739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF739 16724 bytes
SHA-256: 442c5283bbaf71559ef8714e28e875eca4554f312a0efffdb4fa42af06db160a
font_01_sfnt_off00012291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12291 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA8 10616 bytes
SHA-256: a8685320bdd877ef543ccc98e3bc237f82b4335b99696b259d46f3b0ca33db1a

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