Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e3e3431bed043a…

MALICIOUS

PDF

81.3 KB Created: 2021-09-07 05:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c49b220100e5069f9805fe9376480241 SHA-1: d42e06641dbe3c30cb0e7891c2f142f25475ff63 SHA-256: f2e3e3431bed043a0bf5742c400e7d2faed19db969ce276f9e8aa7159ff03ba8
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with several pointing to compromised WordPress upload directories, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further malware. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL analysis and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://puppometalli.eu/file/84076619123.pdf In PDF document text
    • https://alarrabnews.com/images/content/content/file/rudiwesatupajefe.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/dusebig.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/ee3bfbdb4c0766724551cc29c33af602/miwebupi.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/ebpmmfqiqgllm0a4geu6153l84/gagivoritepixitokune.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/94477b77d6baa47e1586c1c24e0d3ac0/paxajitoxa.pdfIn PDF document text
    • http://vswet.ru/f/vajipapotun.pdfIn PDF document text
    • https://dintek.eu/uploads/file/64387709947.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b64e79b42fd---12467470788.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/binenezes.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac4dd8d2e1---18899624651.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/a46a799a3a9d9ebd5ff43d723bb3c57d/remixet.pdfIn PDF document text
    • https://distriparkbotlek.nl/userfiles/files/luluvu.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/72803191079.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/99908634286.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/7fk9i6l3l1fhk37sg5htheki6s/87327042591.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/xekejilanozejitanekibap.pdfIn PDF document text
    • http://iteequipment.com/clients/65150/File/nemabudusunifadoxirorisor.pdfIn PDF document text
    • http://reichspfarrer.sk/file/91250086093.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/77620766087.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/26d63d7722438ad30631359eea7f55d1/28962099421.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=cornell+woolrich+i+married+a+dead+man+pdfPDF 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_off0000d910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD910 17620 bytes
SHA-256: e14f4ce00cb55e0dee678d1fcc2bc5db01091132dca180d80beb68ea1ead240d
font_01_sfnt_off000106c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C5 10736 bytes
SHA-256: 38c9b339c8bb2a37b94986a4496d898d604b82880126a638792c7685d94804c8
font_02_sfnt_off00011f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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