Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1e6d1247aa3c7b…

MALICIOUS

PDF

82.9 KB Created: 2021-08-20 18:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0602f3975b39a952cbe34a70c1df60df SHA-1: f5b4bfa923d0db00c4aaa17fc91533427ed78a75 SHA-256: ba1e6d1247aa3c7b8a60b4ad243c4b0c2ba5a57f2d5a967e40432a6b778e6156
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating numerous small PDFs with distinct hosts, suggesting an attempt to manipulate search engine results or distribute malicious content. The embedded JavaScript likely facilitates the redirection to these external sites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://hoshitorionline.com/uploads/files/kisebekimozupabilenagutiz.pdf In PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/bewawugesapulepi.pdfIn PDF document text
    • http://khojedu.net/userfiles/file/81745016359.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/38856015775.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/79886983509.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/vogojojokefiwiriwa.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/6062354c27734b4ca0d846f60d7111cc/47071854865.pdfIn PDF document text
    • https://acrgruppe.de/userfiles/file/lepukivetujeradop.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/06a32f65cb9fcf4d162696384652407f/bovipedo.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/fosonitado.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9bae50ba0---47490466374.pdfIn PDF document text
    • https://visualarchive.bg/files/15074824670.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/womitupog.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16116dce0309a7---67243779116.pdfIn PDF document text
    • http://grandinspirations.com/clients/75274/File/7614514967.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/57c6fddac5ccc5d7e13360299970ca08/zigifadatukajogiwapuz.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/48230603697.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/41911205572.pdfIn PDF document text
    • http://albarossa.jp/js/upload/files/fipufojaxabox.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb40e035f78---1359625793.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/towafux.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/lagewumu.pdfIn PDF document text
    • https://digireg.dk/upload/metozidileluzimuditavax.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1ee791d511b80c55bcf9318cacd4f93f/xotul.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210611180846.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+withdraw+pf+online+with+uan+step+by+stepPDF 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_off0000dfcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCF 11028 bytes
SHA-256: 53dbb7423deec90112400ce58600794ad57e90503f0136787bedf51492566a46
font_01_sfnt_off0000f933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF933 16832 bytes
SHA-256: e52ed0cb9bf1c275e528598ff605d79698ad4c6b4eeeb9ff755035bc0a72a8c0
font_02_sfnt_off0001252a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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