Malicious PDF — malware analysis report

Static analysis result for SHA-256 df2a01223c8213e7…

MALICIOUS

PDF

82.1 KB Created: 2021-09-01 09:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 590506120c735040890374648ffae96a SHA-1: b73f5278dead6698bcc03dd0aa20b37b5b41b292 SHA-256: df2a01223c8213e70c902d523ed3afb2c308f60892cc10d9649188551c0cbaea
164 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to compromised CMS uploads and disposable hosting, likely intended to trick users into downloading further malicious content. The presence of a visual download button reinforces the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e22c375b83b---sebekiminivaxagawediwi.pdf In PDF document text
    • https://transport-vehicules.fr/userfiles/file/sovexabozolem.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/0d2bdc910c5feccd8633221578e2c9bf/41248727431.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/6843549347.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160b55f8d12036---rejijerij.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/ip8nkt7l5afffjt4e7ubiuiia1/8558962190.pdfIn PDF document text
    • http://ekbdrive.ru/ckfinder/userfiles/files/tiroto.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ce072b9c979---83539564741.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/172559986861029ba8d5b1c.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f901dc559---budaxopiripebibomizu.pdfIn PDF document text
    • http://fujiya-burbank.com/uploads/files/fajejonexakoda.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c692d9eaa8b---ruzilararozefitelowotub.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f50c978c2---furigala.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/hian4bjbq91m4s2013s6dfj3l4/64998238831.pdfIn PDF document text
    • http://askort.pl/Upload/file/lizeketosetamir.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609988b7675de---juzusivupogetazevajik.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/43840561115.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/gijevidamapibemoturunix.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/97140128674.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b73ac8c414d---99023418756.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/5fb915dca60c1372e355fa7041b3205b/pegadupewetotedepuwizimi.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/xemovora.pdfIn PDF document text
    • http://haozuowenwang.com/imagefiles/file/jujenipirijakad.pdfIn PDF document text
    • http://skulpt.in/admin/uploads/file/43606500531.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=watch+the+lego+movie+online+free+123PDF 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_off0000daca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACA 11020 bytes
SHA-256: 4524ca0928f4b6de9b35506eb999d1fcc3b255b1c8d769a5b65b996451cd2a8e
font_01_sfnt_off0000f461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF461 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C73 18132 bytes
SHA-256: e2af95c9b67f80b5532e1cf868e35766571c4f28fa32988c97644278b5397250