Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e17b34250114bf…

MALICIOUS

PDF

85.6 KB Created: 2021-09-18 11:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9c43d3a495ce0c0203e2eb30e13ae30a SHA-1: f7165a94f1ef2d23723ce8a9dcba97d545163e09 SHA-256: d7e17b34250114bf1de7545ac1ab2c5da6669454a77edcc0b19298745dc8abf0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://kodemari.info/data/files/suteravajojapubozeper.pdf In PDF document text
    • http://firmen-bekleidung.at/userfiles/file/35414138556.pdfIn PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/96896488929.pdfIn PDF document text
    • http://metroboxservices.com/upload/ckimage/files/9848291063.pdfIn PDF document text
    • http://avrig35.ro/uploads/fck_editor/file/29503225589.pdfIn PDF document text
    • http://blueview.nl/app/webroot/files/userfiles/files/tefixuxutojenabexu.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/lafkpjl0jro812mbi3a8vrod83/94583279177.pdfIn PDF document text
    • https://himalayanespresso.com/espresso_ckfinder/userfiles/files/fisapatujikubepagaxin.pdfIn PDF document text
    • http://epoptavky.com/is/images/FCKeditor/File/dubex.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/33899417865.pdfIn PDF document text
    • http://thebrownbag.vn/upload/files/74327040215.pdfIn PDF document text
    • https://efckrakow.pl/userfiles/file/mumopadej.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/361c95b1c5ae64637adbf50d263389d3/bofitavixiwusori.pdfIn PDF document text
    • https://darkoyunpin.com/calisma2/files/uploads/98023476058.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa15a4b5dd---sodidananizexe.pdfIn PDF document text
    • http://travelspace.pl/userfiles/file/wewefu.pdfIn PDF document text
    • http://lobi.md/userfiles/file/fenimuj.pdfIn PDF document text
    • http://www.ocptecnology.com/admin/uploaded/fck/file/94808647704.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5c07bb134f345940e930894003ee9bbd/logawuwitopina.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141c3e453f6d---puxone.pdfIn PDF document text
    • https://zenithoverseas.com/assets/userfiles/files/rezovamu.pdfIn PDF document text
    • http://profstil.az/userfiles/file/8985779205.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/gokaretis.pdfIn PDF document text
    • http://swhos.com/upload/files/mabitadiloranapofidajob.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/kabusi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=top+idle+game+androidPDF 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_off0000ed48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED48 17172 bytes
SHA-256: 26e11571ce739b8f9c16a98cff8824d25b4f6ec5974e013dfef08a3e0bd9b1a2
font_01_sfnt_off0001199a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199A 10432 bytes
SHA-256: f62020fb5f00db858f8bf263ab7143c46e1b3dd547167112204be00c25a93342
font_02_sfnt_off000130e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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