Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e3860003bc3d5d…

MALICIOUS

PDF

75.1 KB Created: 2021-09-03 01:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a0fe9bcfb9c229b0340927256e6a73ee SHA-1: 46462bdd48e34346883124fdd10b0ce7a3874588 SHA-256: 69e3860003bc3d5ddfd06495e157dda2d05c8f50f1f84af50ea754aaccf4700a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of embedded URLs, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The primary purpose appears to be directing users to external malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://nomylo.ru/uplcv?utm_term=slope+intercept+form+worksheet+review PDF link annotation
    • http://changrung.com/ckfinder/userfiles/files/pupiporifedizigidij.pdfIn PDF document text
    • https://upaspor.com/resimler/files/11919678472.pdfIn PDF document text
    • http://asustainable.com/global/file/68692842751.pdfIn PDF document text
    • http://dgjst.com/upfile/file/mizamakonanepexen.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/40185652380.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/ec72a2631df50f52ab79fe59e62a1f58/79102805961.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/3298510790.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/66097385335.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/453b0ba9ba29a4b50e5a1006b5ebdefa/85935974997.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/midaze.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ff24a08f476---nopenalonowematekafadope.pdfIn PDF document text
    • http://ausafe.net/images/art/files/xutoxaropabula.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ofrf386qag3b776sst2l8e1r85/23019807848.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2956887ba0---41493944748.pdfIn PDF document text
    • https://astek-telem.fr/userfiles/file/nujoxuwoximopibefomib.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/dupoguweto.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/gixoxijidikitotekudilig.pdfIn PDF document text
    • http://hkwwta.org/userfiles/23861984916.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1994448881---95424634388.pdfIn PDF document text
    • http://metamorfoza-krosno.pl/userfiles/file/deresukidudir.pdfIn PDF document text
    • http://faurau.com/luodan/images/userfiles/file/96029210158.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/wewesavotedek.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc74535dbe8---22662387235.pdfIn PDF document text
    • https://linker.tw/files/visudofomuzira.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9095650476.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/8e8362cf30989c1e380ee6a067648d6e/61486998389.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_off0000c3f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F2 10900 bytes
SHA-256: 40df0c1b54719fa440493b14fd3c63c0a8a387d5b9ec9073937242ca365080f0
font_01_sfnt_off0000dd01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF513 16208 bytes
SHA-256: 0dff17641ce4649f094947588c9805f1789f17e43cad47d65950378d93c36664

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