Malicious PDF — malware analysis report

Static analysis result for SHA-256 adf82bf94319d5db…

MALICIOUS

PDF

87.2 KB Created: 2021-07-31 06:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b3f318f3af0a04485982597f42c8a2a6 SHA-1: 51777c026b6e88dd77048d6c46f3e0f2604cd047 SHA-256: adf82bf94319d5dbde869f380338221292ae29483bd14871690c0efa26d37a84
164 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The presence of a 'download' button lure further supports this. ClamAV detection and ML classification strongly suggest malicious intent, likely for delivering a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://bluefield1966.com/clients/26642/File/xegidunotegivotipoja.pdf In PDF document text
    • http://giasuthienphuc.com/Images_upload/files/ledemapitun.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/88c90b672e82632a08f6f5ac9f175682/45914535546.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace58a50890---fotaxexukivabegexusek.pdfIn PDF document text
    • http://www.kilincsweb.hu/fileok/file/98581423291.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a82e2c7a457---35299605674.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/54798126624.pdfIn PDF document text
    • https://mobspace.xyz/web/img/podborky/files/mamok.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/salugeb.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073792903143---39898491096.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/kikogunotamuboluraledeze.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/wovimidoxowosumipiwiz.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/2dc6d99bde6f65d72c61d493a3eaf2d1/58113249175.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/57200990935.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/vivoba.pdfIn PDF document text
    • http://jucal.es/images/file/29475508649.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16082fc510c30b---30675750237.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/97a882282be1331915877d92a33851fa/dazukifa.pdfIn PDF document text
    • http://hajnysport.cz/FCK_userfiles/file/daguxafetusagidanomekudik.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/sukajifenepaxarewumi.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160add0b3d0b4d---vivozegezananofu.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/8664253603.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/umurpsofnc9hpeg23r5hunudj6/vojeboza.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbdbb40f03---67487476664.pdfIn PDF document text
    • https://5udua.com/contents//files/5912524373.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085ebcda0736---telafarizubagakuvab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=dc+pandey+electricity+and+magnetism+book+pdfPDF 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_off0000ee5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5F 11308 bytes
SHA-256: 8b07e5ffbc0ac0342bcccf72756f4b500d7cd86960ba4e191903619c8c353037
font_01_sfnt_off00010890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10890 16524 bytes
SHA-256: f862c46e0f095c69356f876229fc3e3ccdce0a4b466ce72da4f6a10e085ad707
font_02_sfnt_off000133aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1