Malicious PDF — malware analysis report

Static analysis result for SHA-256 48c6cfc90c289651…

MALICIOUS

PDF

72.6 KB Created: 2021-09-12 04:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0d91ac2fe34620e72d4f3c79a67e757c SHA-1: b2963b508d475bcfc492f2dbb6d1c9a373ead112 SHA-256: 48c6cfc90c289651fe869717875c99034a8e713a2a15ed28360cbd9071add4f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by a machine learning classifier and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The primary purpose appears to be redirecting users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://al-bandak.com/userfiles/file/wudesetemenode.pdf In PDF document text
    • https://factorysales.com/userfiles/files/bajawokukuwageginapiru.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136ce9d44a4c---41888613515.pdfIn PDF document text
    • http://emanuelarombiarchitetto.eu/userfiles/files/22633521732.pdfIn PDF document text
    • http://linuxnewyork.com/draft/media/lokebivikewapapig.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/6967808508.pdfIn PDF document text
    • http://synfarm.com/upload/files/13109557601.pdfIn PDF document text
    • http://pmrs.ps/userfiles/file/pelip.pdfIn PDF document text
    • https://vyaspublicschool.com/ckfinder/userfiles/files/98758762847.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16135957ab2bbc---vovuzoz.pdfIn PDF document text
    • http://laskod.hu/userfiles/file/99500371920.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613b089f92805---jimumivepamujuvifupedax.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/56125331053.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/jusunekizefiw.pdfIn PDF document text
    • https://bestcaps99.com/ckfinder/userfiles/files/33396106514.pdfIn PDF document text
    • https://happyfun.tw/uploads/files/202109060616567209.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/mologelenizixu.pdfIn PDF document text
    • https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/88231952249.pdfIn PDF document text
    • http://offerparts.com/upload/files/57543560439.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/74114722871.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/nepatirefexabilozu.pdfIn PDF document text
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/98957230244.pdfIn PDF document text
    • http://totoquynhhuong.com/upload/files/98167899762.pdfIn PDF document text
    • http://santabruna.cl/upload/file/retirek.pdfIn PDF document text
    • http://gzhangqin.com/uploadfile/files/40305724232.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=remind+me+dear+lord+dottie+ramboPDF 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_off0000bbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB7 16156 bytes
SHA-256: 9d5cd0cc83bc898dced0009167b28671cabac004d7f6f8c38278437f9acda944
font_01_sfnt_off0000e4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E4 10428 bytes
SHA-256: 7870826d2bb4e2243996d30849b19a100d180339169a2404df275bf33f86236b
font_02_sfnt_off0000fc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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