Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4805f668787e35…

MALICIOUS

PDF

85.3 KB Created: 2021-08-16 01:02:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2f5cc86c737af6052099311f6e8cffcb SHA-1: e5d7f6307ffdaf6cde7ba9805ed17a58d0d67a21 SHA-256: 9e4805f668787e35d1e83dc2db0ea8d276bf4077dee6658bb702d2f39e60c72c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the document is designed to trick users into believing there are changes to payment instructions, a common tactic in business email compromise attacks. The numerous embedded URLs point to various hosting locations, likely serving as redirects to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://huntic.ru/uplcv?utm_term=how+to+introduce+yourself+in+an+email+to+existing+clients PDF link annotation
    • http://vksraja.in/fckeditor/upload/file/guvijexajusovotuxewej.pdfIn PDF document text
    • https://eternalbliss.net/file/nunazuzowaxutoxozosafogo.pdfIn PDF document text
    • https://www.caissedesecolesdu5eme.fr/backoffice/ckfinder/userfiles/files/42563204048.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/73127938677.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608294f31cf43---49339817677.pdfIn PDF document text
    • https://progin.ch/ckfinder/userfiles/files/poxikazozadevebe.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c47385d5409---71652656155.pdfIn PDF document text
    • http://iccarrentals.com/files/file/64887572473.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/mbtb5nh3qmg1l5aaglkqg9e7p1/2453699739.pdfIn PDF document text
    • http://xn--9d0b102a6wc3y4a.com/sa_upload/userfiles/file/20210806110619.pdfIn PDF document text
    • https://www.koreayokogawa.com/ckfinder/userfiles/files/56313173390.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/aeql24bce219hnb7p016kumvi3/rorefumozazujukovumokaxuf.pdfIn PDF document text
    • http://buyyoutubecomments.com/ci/userfiles/files/91374625954.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16097dc9325d97---4372005137.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/fokadapusabilobalopa.pdfIn PDF document text
    • https://allianztc.ro/files/file/73508704979.pdfIn PDF document text
    • https://tpk-m.ru/files/file/50633697040.pdfIn PDF document text
    • https://apra.pl/files/file/pesodofowizizaralisif.pdfIn PDF document text
    • http://elesi.eu/fichiers/files/venutaweveviwutoketubusuw.pdfIn PDF document text
    • https://elemental-ia.com/userfiles/file/69341274151.pdfIn PDF document text
    • http://elencostruzioni.it/userfiles/files/49653733541.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/605a8c7384be79227d0efca773ee4fe8/bowejoziponipeligozelurar.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/2d6qv5pjt51jaop8vkibb7ufi5/63104937619.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_off0000e85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001006f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006F 16956 bytes
SHA-256: ecd7cec6792c98cd7cc1e10dc439b599840554dd89bec5de4c42f9686529e7d7
font_02_sfnt_off00012c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C74 11212 bytes
SHA-256: 94b8b6ff22aea2ed09304f94a99598bdaf20adc8f0b7c053dc80f56b8a76bf9f

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