Malicious PDF — malware analysis report

Static analysis result for SHA-256 241df2d29f316d29…

MALICIOUS

PDF

84.9 KB Created: 2021-09-02 05:31:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7e29245e4a41c8718e8c6cee6c9c556a SHA-1: dce22dadca48c1219477789b63b06731c1e20895 SHA-256: 241df2d29f316d298f9933095ba0ed302318f9ba588ac8d044fdf0893d250c55
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress upload directories. The embedded URLs, such as http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/nsm3ko9hhjpvk9aigj92manjs7/80379944494.pdf, are hosted on disposable domains and likely serve as lures for phishing or further malware delivery.

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://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/80bf69fc8b26d33999a2ecb2fad063cd/nulono.pdf In PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/h5degvngqmmadm9n6kjr7fh7rs/velokimafalifomo.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/b5dbf572b475497addd2f0705aa5e2d8/zuzawojijogawonovor.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e20ad2f8e1---40442506278.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611400d747c0e---pilepazaxotupazufu.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/titaxiwezemugarijixevul.pdfIn PDF document text
    • https://www.southdownscellars.co.uk/ckfinder/userfiles/files/matizenediper.pdfIn PDF document text
    • https://www.ojchamber.com/ckfinder/userfiles/files/boxixosonajediraguwi.pdfIn PDF document text
    • http://csc0898.com/userfiles/file/20210714094747_by2h42.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/00e87d888c5971f82283f0c8fedb45e6/48367275893.pdfIn PDF document text
    • https://megashina24.ru/files/files/dazebemojirapi.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/xorenid.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/22528943910.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/48ebbd00a227e235af4dc7443779d56b/kufigowuxijagajagaz.pdfIn PDF document text
    • https://mastirz.com/userfiles/files/lazepezemetufapel.pdfIn PDF document text
    • http://mldinsaat.com/image/files/lofejowulotubakora.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf128444575---52902439850.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/guwexe.pdfIn PDF document text
    • http://e-district.org/userfiles/file/46245425945.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609185b6115b9---zetuviluwugufaximivu.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a86695589ee---gotofujumotusatamanitefi.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/661a357744c147d90a5a9e6b3f7a0ca0/lizave.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/nsm3ko9hhjpvk9aigj92manjs7/80379944494.pdfIn PDF document text
    • http://eastindiaspray.com/suvra/eastindia_spray/files/1726796371.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=today+kick+offPDF link annotation
    • http://forum-auto.ru/data/files/12742186065.pdfIn PDF document text
    • 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_off0000e967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE967 17448 bytes
SHA-256: 63642292bf820cf533d05bc67acde0c74a65cdb95444453bf3a217c9e6a03fd5
font_01_sfnt_off0001172f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172F 9988 bytes
SHA-256: 2a51f5f99302853a1fec44dcee202cd754010a5562ba0d71c1e27f84025cfc11
font_02_sfnt_off00012d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1