Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd8b5fec921c8abe…

MALICIOUS

PDF

95.2 KB Created: 2021-08-14 04:01:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 7006ac6e327103b1de46d1a1437d1426 SHA-1: cdd0b773d3b101a333f1624d220fee70343cb0e8 SHA-256: bd8b5fec921c8abedea8bb816f2a240212eda6b08b58b97dc070b0f961168958
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://smidgel.ru/uplcv?utm_term=how+to+put+up+mainstays+1+inch+vinyl+mini+blinds PDF link annotation
    • http://amandatravel.com/userfiles/file/vetikime.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/xalekewubevejokepan.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/2b5c804ca22e457878ecf09bc849178f/10892631117.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/21815121447.pdfIn PDF document text
    • https://e-ceramika.pl/userfiles/file/zubegam.pdfIn PDF document text
    • http://hzkontejnery.cz/ckfinder/userfiles/files/zaribitawiza.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/2760295a26ab34435f40b00e0040f26a/felugirovapava.pdfIn PDF document text
    • http://envigest.cz/upload/file/kutipowedisa.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ce606a42cd6---56314036583.pdfIn PDF document text
    • https://bayihoki99.com/contents//files/40815300513.pdfIn PDF document text
    • https://protum.se/file/nebufilatokidazejere.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/puroligipejezadulow.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/90995356982.pdfIn PDF document text
    • http://snp-ent.com/files/fckeditor/file/1259268129610d792468e38.pdfIn PDF document text
    • http://shield-in.com/userfiles/files/wiwesolunegigaku.pdfIn PDF document text
    • http://usmleworkout.com/files/file/munelezer.pdfIn PDF document text
    • http://mueblesdepladur.es/1/userfiles/file/28849123743.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/gavagajagobarilap.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/fc983502c07b82bd760162c669172907/vetoniwuwibobogolan.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/18700294984.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4bac75eaa---27598407389.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070d66263b27---84889714448.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/59116446002.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9065706ca1---neliresikazugefugor.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607649565dc73---fowonukemomasa.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D24 11096 bytes
SHA-256: 71a0f877265701eb42aa912efec6fe0e110acd53c85152aa8c3dd492f6dd1f3e
font_01_sfnt_off000126b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EC4 17888 bytes
SHA-256: 69b30cd1f2eb44b1f9b45d33568edb4c89fccc675b3d20ea55789c8ac5640e1a

Open this report in the interactive analyzer, or submit your own file for analysis.