Malicious PDF — malware analysis report

Static analysis result for SHA-256 58cac0e1559227f7…

MALICIOUS

PDF

90.3 KB Created: 2021-07-29 20:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 09b3483df7076a7c7890287db89a2f29 SHA-1: 2392191866d7f2a8ea1c329c913889a91b7a3aa1 SHA-256: 58cac0e1559227f7d7ddadf8dd6a5ead635e3b6f0f6780dbe3a4f66e66c7a371
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and URL distribution align with a link farm used to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/ecfb7865ef98d8c862568441c8fedd1e/65544672605.pdf In PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/8v7b9diqo9k3sapger947j0sj9/meligevegapexukejoputo.pdfIn PDF document text
    • https://rugerwafers.com/demo/ruger/beta/userfiles/files/sevivularogikakaravewog.pdfIn PDF document text
    • http://ruihuitax.com/files/file/90440580145.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/bonapig.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2e559f157---vopazopavudubujoparakapi.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b23c80bef1e---47195781978.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35ebab9a27---41247569112.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9592b0966---65982945202.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8a0c68b4e---66358709426.pdfIn PDF document text
    • http://aurora-c.jp/files/files/90932924900.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca81a2e0df---79068686326.pdfIn PDF document text
    • https://ak-oroslavje.hr/files/vajeposujovapap.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab0dd97f42---tesubomokelewalevevofoze.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/b053133171475cba19d91073647d0751/sikupugiluje.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/8a2a7d1dbc8446541fe3010601af4b80/gojerixokuson.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160c460b51e951---virijatovepizolenolewon.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/81ce950476c3349cb42a6494fe41fd74/larakoresavizorajovori.pdfIn PDF document text
    • https://latework.cz/soubory/fusoxabivob.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/e292c59378e9f7a9d0607ebc05db23c5/241951429.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210616075415.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160765845bb276---5747235237.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/95621262863.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cecba72199---niperasivoli.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/43006981617.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/9217509992.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=neighbors+2+sorority+rising+full+movie+download+in+hindi+480pPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF391 11956 bytes
SHA-256: d05a82d499d8357ed06506427ccfe96784b6a9b69b33518df4ab141db18b98af
font_01_sfnt_off00010fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDA 18376 bytes
SHA-256: 66a0da79f26698d3fef2edd515c4c0872131ff4fdfd745834d889340309eb0c3
font_02_sfnt_off0001405a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1405A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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