Malicious PDF — malware analysis report

Static analysis result for SHA-256 466449fb12a5da80…

MALICIOUS

PDF

75.1 KB Created: 2021-09-22 10:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 61c3d15bb0251d7f1183ef5a3ff75781 SHA-1: dd0092db4203281b86c22967b944a2ad1a4fdaa9 SHA-256: 466449fb12a5da80a124b0bbfc9f6b2a8630cfaa8a4a3bd1c436e8d9054dddb9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to compromised websites or phishing pages. The presence of multiple links hosted on potentially disposable or compromised domains reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=tiger+wallpaper+android PDF link annotation
    • http://bacsionline.net/userfiles/file/sipax.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/37777424323.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/32057971591.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/83376332276.pdfIn PDF document text
    • http://fairfresh.net/assets/admin/ckeditorimage/files/87252014312.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e720307da---mapemojekoguziwezu.pdfIn PDF document text
    • http://baschin-heizung.de/meineBilderAlbertGrundschule/file/nefoputonijag.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/fedogikisagoserixa.pdfIn PDF document text
    • https://venusnvs.com/userfiles/file/navuji.pdfIn PDF document text
    • http://119pump.net/d/files/15940540920.pdfIn PDF document text
    • http://sieuthicayxanh.vn/webroot/img/files/86098892312.pdfIn PDF document text
    • http://planbmedia.hu/files/10305387475.pdfIn PDF document text
    • http://ambulatorioveterinariomariani.it/userfiles/files/48558362130.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1614036393686b---xulapewaganinili.pdfIn PDF document text
    • http://immobilieninvestors.net/userfiles/file/93391121381.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16135f5fdb2307---31954939208.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/vovivipugufe.pdfIn PDF document text
    • https://pernambucoimortal.com/imagens/files/lafolodowatalaniguger.pdfIn PDF document text
    • https://xtremefitksa.xbodyksa.com/ckfinder/userfiles/files/87422597675.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16142afc814054---19236340174.pdfIn PDF document text
    • http://terremeraude.com/userfiles/file/tirotodurulifagopebogudav.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/vukenivetovipexuxi.pdfIn PDF document text
    • http://kgmda.com/upload/files/44363680900.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_off0000c29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC29A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB1 10352 bytes
SHA-256: 7e757b3a4ce3319ec1ca6ee2bd8c4449ec1c564bebe8f14c2591a4165df391b0
font_02_sfnt_off0000f1eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EB 17460 bytes
SHA-256: 1d2f102e09962fea36c775c54b79c26e3e2cd9131976f37c3c951b74f4dad40e