Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ae1b1f6ab917348…

MALICIOUS

PDF

79.0 KB Created: 2021-09-05 00:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d678f9ce7d050e36d29135e1c6f00216 SHA-1: def4aca0e50274f0a70f9c527413b3e6f79fe492 SHA-256: 3ae1b1f6ab917348c5c1bd12c8459f4663a0eced3715818d9b8d725dfc76a597
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to websites that appear to be hosted on compromised CMS platforms. This suggests the document is likely used to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdb874a0ec---97046907280.pdf In PDF document text
    • https://badrivishal.com/media/63904533147.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1610333c8ec150---wusegiwurenubutakomoseget.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d16e6df706---wonet.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/rulizorulibazabezotewode.pdfIn PDF document text
    • http://nasikampung.info/contents//files/60450055683.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bccb425ed55---tolipowudumukutadiriwawa.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/11142771132.pdfIn PDF document text
    • http://faradbox.pl/files/file/nogobozolol.pdfIn PDF document text
    • http://muszempilla.com/files/file/saviwizorurememodixatij.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/45376208208.pdfIn PDF document text
    • https://somogyplusz.hu/files/75151140729.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/91759186409.pdfIn PDF document text
    • http://www.xzass.org/ckfinder/userfiles/files/96228109014.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/82psjufi81oti6qs3rg6bmptk4/13640309309.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/mageperitenozegesugojexaj.pdfIn PDF document text
    • http://manu-transport.com/documents/file/wubuferomubudarozes.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/gamodisadi.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/o38vs92e6c0dde1hlqicp1ric1/77044614639.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160840169dd664---golunosapoguregutegaxojo.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cae27859e73---63013444440.pdfIn PDF document text
    • http://muszempilla.com/files/file/xenuvuxipugofejo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=stories+of+ourselves+pdf+downloadPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A0 16944 bytes
SHA-256: ea3741dc480814a12f29831077ba062eb5ebaa1ae3a58dfdd31d57347be78f03
font_01_sfnt_off0000fd03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD03 10820 bytes
SHA-256: 9fe425577b0aa4e26ecbed038a30dbd9537575b650b060e4f4aa6b9b6f5eb113
font_02_sfnt_off00011624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11624 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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