Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1259b6d8b9693d…

MALICIOUS

PDF

93.7 KB Created: 2021-08-08 01:55:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 01fed7baf8e2c5b61f56d340cd01a33a SHA-1: 39f5677e126588e42c6f9fecaf078f7556efaa9a SHA-256: 3d1259b6d8b9693ddfc0767b0ec8673f912bca0aba2d1b2f221d509204418f29
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ClamAV and an ML classifier as malicious, exhibiting characteristics of an advance-fee scam. It contains numerous links to potentially compromised websites, suggesting an attempt to redirect users to malicious content or phishing pages. While no scripts were explicitly extracted, the PDF structure and link farm behavior indicate a lure for financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://xenang-mitsubishi.com/fckupload/file/71616744005.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/602j21ud6c3pvja38q9hjsir91/fezetifufuwiwarizar.pdf
    • http://sity-luxe.ru/userfiles/file/8823078222.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/pjhqd8d5l6lhnlf2uhjno62ne0/xilesutifofizobabiguza.pdf
    • https://lamaisonducoeur.ca/upload/editor/file/xixanubolekavi.pdf
    • http://allycatering.com/userfiles/dodefejadavefot.pdf
    • https://rinducm1.com/contents//files/besowuzupopusoxifiz.pdf
    • http://usmleworkout.com/files/file/71042438632.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a23c709c145---54802751541.pdf
    • http://alarcon-v.com/editor_upload_image/file/nevosotajanivenatiwapamoj.pdf
    • https://arvikabc.com/images/uploadedimages/file/12083120240.pdf
    • http://sntaviator.ru/ckfinder/userfiles/files/28737018352.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/068b7ff176632a00fd63e018d5c738fa/951130521.pdf
    • https://ikima.fr/uploads/file/givopipofuviridu.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/mfkoek2cva03aqonp267ob58bs/26233202072.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a64b3996f---23200214237.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610304beeafbb---bezurejavikifonid.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/ikiv4lgkp13kuokvavbvpfcaou/67259202403.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/91f8c8b57d323f7cbc2c815431fee4ac/19828878190.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/k81d1thrne1k4tl49l3qgm33d7/pisexuzevukexifut.pdf
    • http://thongthien.vn/upload/files/lomexaxutinujuruda.pdf
    • http://goozzl.com/userfiles/files/jimev.pdf
    • https://rawoctane.com/uploads/file/pezuwebasutafig.pdf
    • http://upsshop.ru/ckfinder/userfiles/files/88018637640.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/2f22cca997195d5fbe35ae80c2037abb/xugifikojojewejamuri.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16079524fa1735---jilajimexitoxejudotusipu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+to+reset+spectrum+universal+remote
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109d2.bin
722d80b49bd8daed0485b7fd9520432a4bbaaff1848d9f2fa7f7c4795cdffcbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x109D2 17192 bytes
font_01_sfnt_off000136c9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x136C9 16792 bytes
font_02_sfnt_off00014ee0.bin
937ce7ec1e673d65b2e711b22472c6689b5d0b24e40bd950c7c6d883146d1258
pdf-font-stream PDF embedded font (sfnt) at offset 0x14EE0 10780 bytes