Malicious PDF — malware analysis report

Static analysis result for SHA-256 31cd88a517417bc3…

MALICIOUS

PDF

250.8 KB Created: 2021-08-02 07:58:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6cace48d3f0185366a656b1b14d62506 SHA-1: f849224749c656df2ae2e8443b5cc3d2e0036eac SHA-256: 31cd88a517417bc3d1108eea766c2b81f4e762ea61d9444630ba8c9098b2f546
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains heuristics indicating it is a phishing lure, specifically impersonating DHL and presenting a fake invoice. It includes multiple links to external PDFs hosted on compromised websites, suggesting an attempt to redirect the user to malicious content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9639

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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+write+a+survey+analysis+report.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/16107751703.pdf In PDF document text
    • http://bitite.lv/media/txt/122/file/busugizezomisipakipoku.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/8b3b91788caefc00164fcf964c4b7022/1811935469.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/0f29a84a976dc4befd99ef8d7c7373d6/wuzudosamuv.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/d82880a7b1470c64c8755efd2f734589/23422856313.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/palibosinivinukelopuvi.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/24368107822.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080dfb02b69c---29857928750.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/puwezitis.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/386517c38a48dbe3f3131b975279a155/nejipikutikusevera.pdfIn PDF document text
    • http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/db9319d9a69e265060501332d4ae0648/97941671207.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/92859354758.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a74b56f2ff7---59701877063.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/46091329022.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a8248d6a8---vemomisi.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/5358cf4ea96233de3dfdb83ebe441c25/viluxapivori.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160832be2836c7---62737299447.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/aeugugo4b666446on6qa18m1se/geniwelezezeli.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/rifefatotubigalo.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160863bc54cfb9---6798884971.pdfIn PDF document text
    • https://qqhanoman.com/contents//files/75431802741.pdfIn PDF document text
    • http://ithaca1962.com/clients/41687/File/rotemimojifefatuvojemuf.pdfIn PDF document text
    • http://maidichike.com/upload/files/kutexok.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/20628210702.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/6hg2rafhprl5vpu6i3sotbssnm/8828978570.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+write+a+survey+analysis+reportPDF 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_off00037bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37BAB 18288 bytes
SHA-256: e7cd95848fc5cfa074d11e7d7baef1fc36eb8e85ff7df5ae2a1212cf883d7742
font_01_sfnt_off0003ab9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AB9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0003c3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C3B4 10600 bytes
SHA-256: 692ca60c34882243f2e80eacb7dd9c65dc8367dab4dd7e5864f7167699a153b9