Malicious PDF — malware analysis report

Static analysis result for SHA-256 45216c0687901395…

MALICIOUS

PDF

72.2 KB Created: 2021-09-07 05:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 964217651e0ca878150bb53f2595285a SHA-1: c6017c5b00e548f4153e15a3d73bd86abb9e3d39 SHA-256: 45216c06879013951fa34c12babc67334662ad18d07cab57c5946931bc3f971d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous embedded links, many of which point to compromised websites or disposable hosting, suggesting a link farm for distributing malicious content. The 'SE_CALLBACK_LURE' heuristic indicates a potential phishing or tech-support scam pretext. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of an attempt to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://2m-m.eu/userfiles/files/diziw.pdf In PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9b2ccb0e9---toketerora.pdfIn PDF document text
    • http://drukarnia-warszawa.pl/pliki/file/dugizipuware.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/0b70f236ca26b86b22221710e945205d/goludakotokivevovekilago.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607712bfc60ff---15501008974.pdfIn PDF document text
    • https://marblo.com/app/webroot/img/files/genizovo.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160c53e07b524b---92116150598.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/db4c3618abc0395d91426e5cd71e0a5f/xusofusixeminugilikimu.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/37325633062.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/fegosevurovaxetuxi.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c4cd480d9d2---54397771603.pdfIn PDF document text
    • http://epwuae.com/userfiles/file/50813299156.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/30216551164.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/74398432874.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/90274041874.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/343bb2a25713cbed02145f77bebf904a/3617549142.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/wekivarutixijerulaf.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/nusixeboturiravanidu.pdfIn PDF document text
    • http://ip-malkov.ru/uploads/files/29892223227.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/c3346dc313165ac0317e22eed7aaba51/vaxiwepakezodexeroze.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/loo4t59u99tasr9l1epra90dn6/26672762831.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/sapawenigojem.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1610761cd3658a---20928115538.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/29d46a6b05758a6f31498557bf67c8dc/9855423625.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=manajemen+sumber+daya+manusia+marwansyah+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_off0000b939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB939 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d14b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14B 15776 bytes
SHA-256: 6bd290fc0454d0d8c224122beebe2c110881193241b06f179121c7e54e7cecf8
font_02_sfnt_off0000f9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B1 11060 bytes
SHA-256: 4fd5986b7ca153d001b12085bbbf011ab9806c9304330fb3ac873c4105970688

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