Malicious PDF — malware analysis report

Static analysis result for SHA-256 d75715d13432a168…

MALICIOUS

PDF

90.4 KB Created: 2021-08-07 22:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bcd80a51374d042a7d714274edcaae0b SHA-1: 2662c719dd49e4dc8bb476d32bf1b1f89f072a45 SHA-256: d75715d13432a1682912c69384049935669f0c5887de34817d4f31f894c430b8
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised websites, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/f4cce492ef54e56144c9edcd86c18abf/wizokinokisusipapivesew.pdf In PDF document text
    • http://mevlanaasm.com/resimler/files/74727223085.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d3d663dff---pelatozivi.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608afc394579c---42288220205.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b361db994b0---71482065889.pdfIn PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/69928977118.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/0b96fd84b096637b597c14ff13e195b4/95826407153.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bafee01bec2---xuvuvisidi.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/wimadejodademusugidijijes.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/betasawevixuvelovalifupo.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/lobuvabomowigo.pdfIn PDF document text
    • https://yar-net.ru/userfiles/file/nakolusi.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a38a283b4fd---71277509540.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608556a7a0229---19673610337.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/uqtr8f14h1a8vuba7on2nbi7i2/46139718595.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a49999d356c---kepowovamuletosafepi.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/96263828801.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/fe27ccab2758e5ad3eb499f799506b43/47357943519.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9032b2bdf---kisorowud.pdfIn PDF document text
    • http://accronline.com/userfiles/file/dolufiforevapilipomuboja.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/7bc0ecf32ad513420d6dc5191ee973cc/tojawo.pdfIn PDF document text
    • http://www.conectadoscomdeus.tv/arquivos/file/xavesazub.pdfIn PDF document text
    • http://www.yt333.com/userfiles/20210722/file/1626906273.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+to+study+shankar+ias+environmentPDF 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_off0000fb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001131e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131E 17684 bytes
SHA-256: 373052f630756a057d4bd26e7525edac230666453903097f1a0e708986b13f55
font_02_sfnt_off00014195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14195 10916 bytes
SHA-256: 29542ee50dfe92b84097c856a60e4cef62cd4754bc808523b724af8cc30ff133