Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5006ed336f1677d…

MALICIOUS

PDF

146.0 KB Created: 2021-08-13 22:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 9a4c9a758856b6e93c60e099b8206ab5 SHA-1: 260460faad262f422da31e89b50b23b50e36b8e6 SHA-256: d5006ed336f1677d671ffc1b0cd164ebe6c5585aa0880c62ead18a881a486290
156 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting. The primary goal appears to be redirecting users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://refour.eu/wp-content/plugins/super-forms/uploads/php/files/ea32b53d504f4ccc50d727dfde6bb061/julonesunotimot.pdf In PDF document text
    • http://plafondchauffant.fr//img/user/file/derijonolutuxakexasi.pdfIn PDF document text
    • http://suttonoakfarms.com/clients/880813/File/sobabulus.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/67030370270.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/8957984800.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160982c437cc74---87571335142.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/3ab4373ec014bb33c4231c21b137e0de/9840678832.pdfIn PDF document text
    • http://airfa.it/userfiles/file/60689786957.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4495e54b2---wileniweji.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de67fd4b081---rixufimuzuzige.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa42a0bc7d---99566140988.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/0d95a42903c1031292f729a850293b92/33364075144.pdfIn PDF document text
    • http://gnatowski.pl/attachments/file/jemurosuribefipusufam.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6beba08bb---72044697026.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba6cd88bd8---magugesate.pdfIn PDF document text
    • http://nbpcpentecostalchurch.com/clients/65183/File/sowiral.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/vinorizitugi.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/mqueurgtgsj2evf72b2r5ael5m/30654003117.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd3aaa296b---68913147311.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/fibofetegatora.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/onk7g8uejoupp6519sd5aeqem1/bedajevenemomefelidod.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/ac09b7eb1c28755811f644b12e1183fe/duwatemerimatebeti.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/b760f2b0e0d6f44a0730788954615d57/zevetesomutewinoso.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/e49cfaabb85fdc7933ae469fe0ec690a/64785170108.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=derecho+administrativo+ii+rafael+martinez+morales+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_off0001d105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D105 11012 bytes
SHA-256: 01f293cf1a2f64b3817db86c7067438a8a1995162a91daf62fdce504df19a2d3
font_01_sfnt_off0001ea78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA78 20528 bytes
SHA-256: 488fc8382a84aeca315765924c20f56d63dad6a259a3059777ed839d01013f82
font_02_sfnt_off00021f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21F50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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