Malicious PDF — malware analysis report

Static analysis result for SHA-256 d59044f6b616f3a3…

MALICIOUS

PDF

92.2 KB Created: 2021-08-14 01:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ba6478a24d62d93650a7265601786dec SHA-1: 67b8639d5decdb99291623ca0da882091de860c9 SHA-256: d59044f6b616f3a39199769951a5d1742019d08b7bbf7dc98b97188d87652e8f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links to compromised websites, indicating it functions as a link farm. Heuristics suggest these links are used for SEO manipulation and point to potentially malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, likely serving as a lure to phishing sites or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://ketchas.ru/uplcv?utm_term=cast+away+full+movie+in+telugu PDF link annotation
    • http://heibldr.hu/FCKfeltoltott/file/jaxagixo.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/83441193078.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c36c30d80cd---sidiruboj.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/jizaxikafomekobal.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b2422475e2a---jedevunubefobusako.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/dajotexolaxuwedizoxalad.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/lidaziso.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/13406089311.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/tr57o701u8honlmh6lja3vjh5u/76658496329.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d67a132c6a---kinawi.pdfIn PDF document text
    • https://makanbanyak.net/contents//files/gekefizulanen.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/11184502146.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/zokexina.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c695089f683df019a4e326287928bcbd/7772460062.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/263cfae1caaee1019cc55b37a9aad1de/45928734529.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/5b31a7257d334a3a24ec5aff6926b524/vuzuvizagetogajativufafi.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/s9qgj5ifnpj8oppi7kran2g0q3/pabalikakimilug.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/61119667367.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111ee2e80031---fosagirujirufor.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/bezogewikosekagiji.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c24f64e8d16---gajokunep.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_off0001054c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D63 10856 bytes
SHA-256: 6b2620972effb879ebd251789461d70d5e9e4ff0c07c9ecf51d896def01846e0
font_02_sfnt_off00013690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13690 16560 bytes
SHA-256: b10f613d6b146dd1515c097a8f565ac723a39548346640cf52d0121850e1826a

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