Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d94322014768843…

MALICIOUS

PDF

76.6 KB Created: 2021-09-18 06:19:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 137686e449d531c44330b6ae335b7449 SHA-1: d41fca502d208c165ae0f7ea3fe5009a7475ea74 SHA-256: 3d9432201476884332787377e69e599e4330b61143fd88abe87bf6dda494e65b
164 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on multiple websites, many of which are compromised or disposable. Heuristics indicate this is a phishing attempt, and the ML classifier strongly flags it as malicious. The presence of numerous links to PDF files suggests an attempt to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://basundharamart.com/userfiles/file/zusalatimofafazuvidunudik.pdf In PDF document text
    • https://suruburi.net/mm/file/xanikezo.pdfIn PDF document text
    • http://secoinblock.com/upload/files/bokapuja.pdfIn PDF document text
    • http://519pf.com/userfiles/files/zafugabaripete.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/86671029550.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee3222c881---36863880218.pdfIn PDF document text
    • http://husplaza.hu/editor_up/62624238976.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/943f3dfd4d2f693a226e5b8734a6cb46/4616853931.pdfIn PDF document text
    • https://vanchuyenduongsat.vn/upload/files/bodivokovonedivupudafuw.pdfIn PDF document text
    • http://henskeschildersbedrijf.nl/upload/12745074392.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/velazidunopebuxekowaji.pdfIn PDF document text
    • http://infosierra.es/images/editor/1251884345.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/431152d40914b423fe9dbbc40811bee2/53193816977.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/woror.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338f4f70f6f---patifupijawosesajufe.pdfIn PDF document text
    • https://nevjegyzek.eu/uploads/file/zabuke.pdfIn PDF document text
    • http://helloslow.com/data/userfiles/files/fabixasibaseluf.pdfIn PDF document text
    • http://anshan56.cn/userfiles/file/16313247061291661547.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210917211223512.pdfIn PDF document text
    • http://binhchuachay.info/Images_upload/files/rarawolofeburusivorefe.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/29388126320.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/xotukajowomovuli.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/19036413872.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=all+adb+driverPDF 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_off0000c8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FC 9936 bytes
SHA-256: 7899d1dde2f4517a710e76aa8743927a4669f336a3a701ef782f366796ff80c2
font_01_sfnt_off0000df02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF714 17640 bytes
SHA-256: 72e0e5b5b809d3bd10dad750a2580622eef87689c22c0d9ad58d53996c051f26

Open this report in the interactive analyzer, or submit your own file for analysis.