Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67a51abc25e5eca…

MALICIOUS

PDF

84.7 KB Created: 2021-09-02 13:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fa86b60ed102c7770ab7ca5a875f82eb SHA-1: 14dbc90aa866840464fe6d3885b823d56d32f791 SHA-256: b67a51abc25e5eca49976da78ae3814703b708f7ad5f85abfdce974c24140921
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure. It contains numerous links to external websites, many of which appear to be hosted on compromised or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the 'SE_INVOICE_LURE' heuristic indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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.
  • 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 https://huntic.ru/uplcv?utm_term=definitions+of+accounting+pdf PDF link annotation
    • https://abofahed.com/userfiles/file/luvawuxopixakibabetige.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/79013139754.pdfIn PDF document text
    • http://signauction.net/userfiles/file/mumig.pdfIn PDF document text
    • http://dzwigipoznan.pl/userfiles/file/9542874856.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/31433838789.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/45363ff9166182e292c863dc46ad2a69/wonutif.pdfIn PDF document text
    • http://chikatere.com/Upload/files/43755813805.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/66jkgj22qedls924qbrup3a96v/sepogopidefusu.pdfIn PDF document text
    • http://glttek.com/userfiles/file/bogezafomewirurigamiv.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/o48cig60id55iudod7g2enacrh/33522790211.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/rivabirufetozegomovevalu.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16086952c7fc30---42621074162.pdfIn PDF document text
    • https://signika.pl/Upload/file/nusolibozilalulogifikox.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/kiwilawitusakofak.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/wosekof.pdfIn PDF document text
    • http://happy-land.hu/editor_up/98225878456.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/xisag.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/7f31de169ea0015fbd1fb4bdd7706eab/15448177666.pdfIn PDF document text
    • http://frankslawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gadidupulefu.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021081414493624460.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/2e717ed25576f4898bf0df0ec9b76d61/15903888912.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/59677447823.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_off0000e63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63D 10752 bytes
SHA-256: 3237ec3de46bb0138a3699c837155b94dd83406525e7e2e4c8fc3c8e64a17b30
font_01_sfnt_off0000feea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEA 17976 bytes
SHA-256: 6a3a8649633d068a5c29edd202a11c2edab183b378b66f6eb7e63f27087810c7
font_02_sfnt_off00012d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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