Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dfd114dd7a6d0ba…

MALICIOUS

PDF

84.6 KB Created: 2021-09-16 05:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 122dd8626e77ebeee21ad69050babf55 SHA-1: a824ea3ed242f7bbc2d0ab769cf3ec4fb64fdb15 SHA-256: 9dfd114dd7a6d0ba6fa75cf92978d2d0b93cc43af190b129a6fc794d30ece410
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document exhibits characteristics of an advance-fee scam, using lures related to lotteries, prizes, or funds requiring parcel delivery. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, which likely serve as part of the phishing infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://smidgel.ru/uplcv?utm_term=how+do+i+check+my+data+usage+on+my+android+phone
    • https://ewt.cz/res/file/venetepapejewesefefifa.pdf
    • http://reafamily.lt/ckfinder/userfiles/files/kupudabenilugogubepi.pdf
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/jiletotedifezevakepawo.pdf
    • https://bruceautoservice.com/files/file/21708467219.pdf
    • http://avanti-kuhni.ru/upload/files/godubijeketiwewolanowiku.pdf
    • http://progettocecinacuore.it/writable/public/userfiles/file/98897628393.pdf
    • http://slsnn.ru/content/files/59502149435.pdf
    • http://ammk.sk/userfiles/file/pazoxiluvol.pdf
    • https://stka.gr/ckfinder/userfiles/files/44975155290.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7b31534a8---juzijedabaxorejuvenu.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/ade8c807b9175f9af48d9a1daf65de4f/jilenedujerefaraforewiz.pdf
    • http://wx-bm.cn/upload/ckimg/files/202109090636313645.pdf
    • https://o-dance.com/upload/files/16749418906.pdf
    • http://adwokaci-pila.pl/userfiles/file/diroxep.pdf
    • https://jlgardner.org/home/jlg/public_html/ckfinder/userfiles/files/94231606161.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161428540f2b62---268487383.pdf
    • https://asoriofrio.org/ckfinder/userfiles/files/nijijepelerekowofefanaw.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f326abc458---ruruvozudib.pdf
    • https://siltri.com/fck_upload/file/46205266748.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/c9c4a10ebfd2742ca5225fd9d69f3f91/98959961901.pdf
    • http://asiadomainstore.com/userfiles/file/25911691576.pdf
    • http://pegastelco.com/pictures/files/94057767679.pdf
    • https://www.huaikrachaohospital.go.th/assets/global/lib/ckfinder/userfiles/files/ratusujojopakoke.pdf
    • 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_off0000e18f.bin
5c5946cfdfbb71d08c657f59eb2d8de7fb95b0a51ab102ab97c8ca3d680b622e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE18F 18336 bytes
font_01_sfnt_off000111f9.bin
ebc4bbf855ad5f80cd51513fc3ae024f837b946c3b0d845a2684cf05d62cf031
pdf-font-stream PDF embedded font (sfnt) at offset 0x111F9 11296 bytes
font_02_sfnt_off00012c2e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C2E 16792 bytes