Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe7b48149af8d07…

MALICIOUS

PDF

117.9 KB Created: 2021-08-25 06:26:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eff08cfe9c22ee02335b93224f3bed42 SHA-1: f281031bee104dbf76a7f0cba68586da31eeb648 SHA-256: 9fe7b48149af8d072acfe778905a7b7bb5cf96fb269e63aa9723bcd3a235a9c2
164 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload directories, forming a link farm. The presence of urgency language suggests a phishing lure. No scripts were extracted, but the overall structure points to a malicious PDF designed to redirect users through a series of links to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9863

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/9afc7a6960642d80dfc8f518d3710218/vafagodifirunanorir.pdf In PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/39320523064.pdfIn PDF document text
    • http://kisito.com/userfiles/file/59698714573.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/66688997076.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c71cbb3a5---turigimadadiwowotoki.pdfIn PDF document text
    • https://aful.edu.pe/ckfinder/userfiles/files/sefinilowozaguruz.pdfIn PDF document text
    • http://avalon-essenzen.at/userfiles/file/57767359657.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/57494799315.pdfIn PDF document text
    • http://albertf.madteam.net/ckfinder/userfiles/files/bedebotomatubedetid.pdfIn PDF document text
    • https://pasarantogelsatu.com/contents//files/75393036586.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd28420a7c---55746777515.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/23280115669.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0a28a6881f---18778336627.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5489d5d2b---zoletumivopaminotenonutip.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/d491a8b8ba2b6bc691027b7c58abff23/dedoja.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16073004c50ecb---safif.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/f5edc62d59576528f64368df651f3578/lokafomo.pdfIn PDF document text
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/bikize.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfe8a40752---36663511804.pdfIn PDF document text
    • http://idcla.net/upload/files/jagol.pdfIn PDF document text
    • https://susta.vn/userfiles/file/jetikobukusew.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160f509fdcefb6---fatuwutu.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/f78d2160d7420bfa9634527dfade2f55/37372739070.pdfIn PDF document text
    • http://lulanjina.net/upload/files/48938433296.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/0492ca4e08c524271e966badc83869aa/72124073466.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160817c561c626---83684495709.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=esther+in+the+biblePDF 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_off00016c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C50 10048 bytes
SHA-256: d7afd9ae48fbcbe1650c010e2365e64a1d8dabc9c6fa97446f3f5c7cd6938c4c
font_01_sfnt_off00018286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18286 17124 bytes
SHA-256: bae23c894f00b004e59692c91646609743be203bf0a8d3ed546bcbbedd565073
font_02_sfnt_off0001af14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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