Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eef7187b770ff83…

MALICIOUS

PDF

76.6 KB Created: 2021-09-19 05:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e0b0441bb03bf952a84ce559b380ffda SHA-1: e497ef953c329d8b7f67e11e71f1f1512f35bac1 SHA-256: 1eef7187b770ff83b5a5034455e6e780988636387eef7e29bc5266a1ff7252c8
176 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress uploads and other disposable hosting, suggesting a link farm designed to redirect users. The presence of a QR code lure further indicates a phishing attempt, likely to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=exo+video+player PDF link annotation
    • http://dioceseofniranam.org/userfiles/file/dotenilakedi.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/161390a3b3c2e4---wititijexekolusetiwavejed.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613484304b2df---sesasaxekitavawe.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/wojejamija.pdfIn PDF document text
    • https://skvacations.com/userfiles/file/52547863926.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/9859968344.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/57010234336.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/73523141148.pdfIn PDF document text
    • http://ilonew.tasksplan.com/ckfinder/userfiles/files/zorimizejamoxedukuretowe.pdfIn PDF document text
    • https://led7.ru/file/nejilofix.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/ujajagebojuve.pdfIn PDF document text
    • https://groupekineconcept.com/userfiles/file/gatagirudasumupugagaza.pdfIn PDF document text
    • http://all4pets.cz/ckfinder/userfiles/files/malopefoxuzinin.pdfIn PDF document text
    • http://artkulinaria.pl/sites/default/files/file/jigugitexamugarusu.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/90470626527.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/59266497317.pdfIn PDF document text
    • http://avanti.pl/userfiles/file/73783511604.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16130ac455cf04---givaferowifigovupolozurat.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/84019734586.pdfIn PDF document text
    • http://elektrostroy.kz/ckfinder/userfiles/files/pezoturinibupe.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/98162429806.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/jimas.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/pomekovevuraru.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/52397083898.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_off0000c92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC92C 17732 bytes
SHA-256: 6e03d68c5f0f7a4865856b54f1432616313027134d55af7459817a2ca5eda690
font_01_sfnt_off0000f62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E44 10280 bytes
SHA-256: 0ce9bc4f1cfd271879ca63a5879842f9e74d211772d8ac1d40be2faf550acd06

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