Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9e334ad83d0e32…

MALICIOUS

PDF

84.9 KB Created: 2021-09-06 21:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ace427aff48e8f828f142a968baf2d69 SHA-1: 5f36fded4b3c24973173aaa60db7d1931f565a56 SHA-256: ce9e334ad83d0e328b86de2740787b20f1f10e06f1c69fb105f368a9d4c77e31
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 websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://philabc.ru/uplcv?utm_term=ethics+in+research+notes+pdf PDF link annotation
    • http://moristas.com/userfiles/files/lopatugunafokarafulunat.pdfIn PDF document text
    • https://samsungdvm.net/upload/ckfinder/files/53510800402.pdfIn PDF document text
    • https://digbijoynath.in/uploads/userfiles/files/buxami.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/k2g06i4f7hmc771ti02vh4ns0t/35636845838.pdfIn PDF document text
    • https://orldoc.ch/wp-content/plugins/super-forms/uploads/php/files/nd76lfcb3kpc3c9q3l5nupgpi6/85534089283.pdfIn PDF document text
    • http://thegioimercedes.com/upload/files/sarujanutezupawigatujim.pdfIn PDF document text
    • http://onellenorzes.com/uploads/files/fivivamofuso.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfe02c978f---jivojatodoxiwetopuki.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/kekatowatevazefawilabama.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/17697541852.pdfIn PDF document text
    • http://huefpdf.org/upload/file/8650217235.pdfIn PDF document text
    • https://rajatotogroup1.com/contents//files/tofanugopofewipotog.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/36994930817.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/79307975597.pdfIn PDF document text
    • https://matfreklam.com/calisma2/files/uploads/wobalogukexezoliw.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/46360085455.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/71237412033.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/77897772512.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/55602810473.pdfIn PDF document text
    • http://caffepontoni.com/uploads/file/peboz.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/88t41mjfvlljne5df2gfi87fe3/gamurirazibewejatefi.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/65711830518.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/89445486878.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/bawowe.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/qe7pmr0fbaslhqebidqtvfqpv4/99042157360.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_off0000e81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10031 17404 bytes
SHA-256: 8af1fc9ebe6ecdfff6a6fe99b39bce2d988a0ba1e8805ad1fc74fe6e5d0d7aca
font_02_sfnt_off00012d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D76 10656 bytes
SHA-256: 3ef54452c77b5e3c05f06ae9361c36c0933d0153117713f48dfcfe8b9cdb2d5c

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