Malicious PDF — malware analysis report

Static analysis result for SHA-256 992a7619af638dae…

MALICIOUS

PDF

70.5 KB Created: 2021-06-28 22:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 2e65b2ba160bb50517ca7ab52ae6ceb0 SHA-1: df6f37957e91a7530d9f60b2693cf4f2ef5454cf SHA-256: 992a7619af638dae7524a454b6288059ba5d92f528fb3f059966de6abc965603
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. One such link, http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0a1b806c1---fagafazubuzed.pdf, is specifically highlighted as a potential entry point. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0a1b806c1---fagafazubuzed.pdf In PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/6pdrcvdmep2qs340bifc3jtqpn/28299142590.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/da902c50d44f7d82c54e14cf88147159/ronodobezi.pdfIn PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/nelore.pdfIn PDF document text
    • http://www.dean-cpa.com/files/adminpic/file/43971210099.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/56g5b04u0iqorrc4l5beibchl1/vixif.pdfIn PDF document text
    • http://mcutech.net/upload/2021/06/file/16248971581778502565.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/jj1obefefk3h5bjthcb0sstbfe/janilome.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/oh3leefubiar92j9l53smtpedr/99887113659.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/4vjv92hv0r651ga4gudpkeafka/pukifibunituruka.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/pejileferilusobutanomime.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/mamixu.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609c81daa6051---79540750622.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/c2ebc47e6604a02eb2ca7cd2a547fd88/18638579351.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/18251259262.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/poxuruzajazezad.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4235bbf8fd---nulabaded.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/59967941291.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/09f49b725a5b65a2141d50c49ee8f295/bimujonujurizemebebaxusu.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/662aad789f99466e46265c86ddfa935b/96475455472.pdfIn PDF document text
    • http://megalaserasia.com/upload///99906659573.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607b18650c79e---faramumepilukofikorip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=what%27s+a+stafford+loanPDF 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_off0000b774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB774 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF86 15172 bytes
SHA-256: f4fcf9e99e032f26ef05341e1e9cf079b7bb42342170802d82bd432870325961
font_02_sfnt_off0000f5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CE 10256 bytes
SHA-256: abc0a4e792805abe9e7e69e5c54e44483771f54f02d36a1a3e8cc83c278207d1

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