Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfeacc39e71611fe…

MALICIOUS

PDF

85.2 KB Created: 2021-08-23 11:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3c55fccf4839772e0577fc0380ec3601 SHA-1: 602cbc641efa6687c33759d392563165652b9f6e SHA-256: dfeacc39e71611fefe98f920929a67b783cdfd9588efc2e90a4d756ebf2b080a
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs that point to compromised websites, likely serving as a distribution point for phishing or malware. The presence of multiple links on disposable hosting and compromised CMS upload storage further supports its role in malicious redirection campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://slaterlighting.com/wp-content/plugins/super-forms/uploads/php/files/29408b88b7a8b3ca26ed2bd5a4f963b0/31880048730.pdf In PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/67542282783.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/resemar.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/bupovuwedewu.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/0f11cc840b3dd683fd0c390f84ee2860/gaxibukatebavawovejokip.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/iq3ia3s4639fkg14q4goh6ea3l/24342670440.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082af6e67689---90937363272.pdfIn PDF document text
    • http://dzbnf.com/upload/file///lijuwobutinipidazewakijo.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/gosuwonuvilifometufol.pdfIn PDF document text
    • http://picart-personal.pl/fckupload/upload/file/45180422135.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a164f258a46---viwoxe.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/94691361254.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/90039201672.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f80b6ea045---88634915103.pdfIn PDF document text
    • http://miele-service-center.ru/uploads/files/jidupidedowujowika.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160777b5f9321f---10699594320.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ca24d7966---fobopoxilodasagumefurete.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/71476866051.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/1021471710.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec40ac4b2b2---65849263346.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/63644701841.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/44219349146.pdfIn PDF document text
    • https://phr4u.com/files/69513867981.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/seloguxu.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f822051cfd---xomufixi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=business+letter+format+block+stylePDF 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_off0000eaa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B8 16148 bytes
SHA-256: 3756843e1aa18d8c84d78e2d53c84fea5b8fa75d50a63ec91ad995a200954986
font_02_sfnt_off00012c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C5F 10996 bytes
SHA-256: 9c6c58da9818d68b790720a7cc457d38868eb129d7a6fd3f834dd5793a272c55

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