Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d76e769e89b46ed…

MALICIOUS

PDF

87.9 KB Created: 2021-10-11 20:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0952bd62e692e2e41fd903a49c7e3c53 SHA-1: d39d69af7b3e6c564e446031165ddf369b0c01b1 SHA-256: 7d76e769e89b46ed5d42c20db36f07bdd1e954660580374a35a092d57027fcec
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Harvest Credentials

This PDF document was flagged by multiple heuristics, including ML classification and ClamAV, as malicious and a credential harvesting lure. It contains numerous links to external websites, many of which appear to be hosted on compromised or disposable domains, suggesting a phishing campaign. The presence of MFA lure indicators strongly points towards an attempt to steal user credentials or session tokens.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://cructi.ru/uplcv?utm_term=complications+of+placental+abruption PDF link annotation
    • http://jeyadhurgatemple.com/userfiles/file/xixukunubidoveg.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1615c282a300c0---zebufanaponosunapamufadov.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/04fdf785666487f818ab16b9efd5f8dd/99491555805.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5356ebd52---jibijafobe.pdfIn PDF document text
    • http://cbstav.cz/file/desonudavalufujavak.pdfIn PDF document text
    • https://jagominum.com/contents/files/dubexegorususilikukegu.pdfIn PDF document text
    • http://mps-india.com/userfiles/files/daxikotuzeruzasefiw.pdfIn PDF document text
    • https://mgc.to/sites/web/upload/files/vovokorizibalupugadu.pdfIn PDF document text
    • http://rc-saty.cz/gais/image/file/zebutudevoveb.pdfIn PDF document text
    • https://pasarant0g3l-turbo-h1t.com/contents/files/22001641961.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/pewonupitixufexur.pdfIn PDF document text
    • https://greenlandpark.com/uploads/files/40580074119.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/wujopozegog.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/lotesubiwifok.pdfIn PDF document text
    • http://toeicspeaking.net/_UploadFile/Images/file/pozozefolej.pdfIn PDF document text
    • http://rcpolypacks.com/uploads/newebodixuwigowar.pdfIn PDF document text
    • http://battle.bpv.su/content/files/files/navevoxuzapu.pdfIn PDF document text
    • http://www.520amis.com/upload/files/23446932910.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137a8cc3b105---1819401165.pdfIn PDF document text
    • https://sentralperdana.com/file/47478645941.pdfIn PDF document text
    • https://izometal.net/mm/file/mizizixikibubeden.pdfIn PDF document text
    • http://daphongthuyhueminh.com/uploads/image/files/22565482191.pdfIn PDF document text
    • https://casaalu.com/luutru/files/mewileziw.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/g2krruajsctutn2gup7f4nma02/nukebub.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_off0000edc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC4 19432 bytes
SHA-256: e2a5d089dac11891ea46427c20127c32b8d70d6f181663420589fc7320a6bf13
font_01_sfnt_off0001209c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1209C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000138b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138B3 10912 bytes
SHA-256: 49e74cde97d27ca0b16a059ff34ef5c164f2ec5546eceb3f9ce28d78d734cacc

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