Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aace5ccf3fc8ea9…

MALICIOUS

PDF

71.5 KB Created: 2021-08-28 02:02:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 12246539eead207ec4854b2e61128a68 SHA-1: 8fb7045885bbfa1ec97173a2e764c6245c4b0b38 SHA-256: 2aace5ccf3fc8ea9d78d0db6d6d5f0a0b8fe5b8f458c80b4774e82e92051cd9c
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and other disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or phishing sites. The presence of a link farm on compromised CMS uploads suggests an attempt to distribute further malicious content or redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://auburn-properties.com/userfiles/files/farimegiromoduwafilux.pdf In PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16094a9e5eb756---gimegidaxofirof.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/494b5c6d161ae59e249db9e963f38422/29477812849.pdfIn PDF document text
    • http://prestopc.it/upload/file/95540163889.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/6003666345.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611ed3c7da4e5---69515451882.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/dagasazexezadu.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd641829c00---76798340165.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/gm5jthimq20k31gt0f0drsiql8/remasixaxigum.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d4251d6f6---surexubufid.pdfIn PDF document text
    • https://vetamblj.si/ckfinder/userfiles/files/78587213570.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072b1bd4c5e8---dukegafonetipetu.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/tajulatakezimumatulipabaf.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/52991393012.pdfIn PDF document text
    • https://btegypt.com/file/jugotidejejinarovi.pdfIn PDF document text
    • https://medpressa.ru/files/file/20632784120.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/99655794952.pdfIn PDF document text
    • https://santehsevast.ru/userfiles/files/59246578264.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1d7d00193a---98485817233.pdfIn PDF document text
    • http://nguyenquangcomputer.com/upload/ck/files/17574064086.pdfIn PDF document text
    • http://interstyle.org/content/xuploadimages/file/fimopozasizinisazu.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fdb7105228cda66857f113101de97c3e/nifosujog.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a77394de91d---nomekusupezugojixoxak.pdfIn PDF document text
    • https://beruanglucu.com/contents//files/kurifilexitizuzadobawum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=lexi+saved+by+the+bellPDF link annotation
    • 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_off0000bac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC8 10400 bytes
SHA-256: f2250ac948bcd7d07603e1b4128925e0199821f71d47176494af602290489782
font_01_sfnt_off0000d27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27A 14944 bytes
SHA-256: a4152d7300f0a00cd122ca067f88541848d07b05f3d53970d2957f1a87e8dd73
font_02_sfnt_off0000f842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF842 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.