Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff695bb9310a89c…

MALICIOUS

PDF

81.5 KB Created: 2021-09-02 05:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 61013185645d244715650960f2e3439b SHA-1: 0c33aeba83cad3a030b19d59856e7cac14361488 SHA-256: 2ff695bb9310a89cdf012d011bfca13ef1581ee5a5d56ace00e188a1c619acdf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to disposable or compromised hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the nature of the link farm and the PDF format itself often leverage embedded JavaScript for redirection or obfuscation, hence the inclusion of T1059.007.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://fmi.lu/userfiles/files/supeduwojifogalurupugax.pdf In PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/0d29389eb2fa930db8a44d2ed3e74103/gakapozokigilenuzakeni.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/78155188186.pdfIn PDF document text
    • https://wineuniverse.us/userfiles/file/fifibefokolopedoma.pdfIn PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kuworupenojoju.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/lexota.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aacfd4b3987---wogukeninemebisume.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/rapirutiwenub.pdfIn PDF document text
    • https://bbu.vn/Images_upload/files/motederom.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/66682151476.pdfIn PDF document text
    • https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/xeworejelariwinabiguwad.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609be871d59d4---kabejo.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/9ae7f73c5fd86703e146febac8d105a8/nusinozufeji.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607a95d79ac3a---16180905514.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/28210745694.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/26061996780.pdfIn PDF document text
    • http://evola.it/userfiles/files/61211034603.pdfIn PDF document text
    • http://pepinieres-soupe.com/userfiles/file/luzokulirilanogasori.pdfIn PDF document text
    • https://rts-wm.com/ckfinder/userfiles/files/70450313455.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0edeb191e6---fipiku.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/1daf7b4d0223414fcd8ce874571e4544/buwoxebu.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/hnc1htu57q2bflqej502uebtcm/99268080759.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb79ded6df---85253687558.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=area+of+triangle+with+3+different+sidesPDF 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_off0000d675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD675 10872 bytes
SHA-256: 70b7f09b5b3ad479e827071b976d05b3ff3c31301f892f35f1607b4f93e463f0
font_01_sfnt_off0000ef70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10782 18108 bytes
SHA-256: fa274b9c7eaaec606a338c6e47ea079d86bf7256a8c04d63d96145d60e770068

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