Malicious PDF — malware analysis report

Static analysis result for SHA-256 56d34d61f17ad7a7…

MALICIOUS

PDF

77.5 KB Created: 2021-08-07 15:35:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dcefa762c8fd22e74e827f5c9e7c47b9 SHA-1: 04f5501e73cc81fac0a6e610ab88e72f59f84c4e SHA-256: 56d34d61f17ad7a73c8cc47d1f824b944450dbbc23550a111035bb46d6807884
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress uploads and other disposable hosting sites. The primary purpose appears to be directing users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://cructi.ru/uplcv?utm_term=maytag+bravos+xl+dryer+thermal+fuse+part+number PDF link annotation
    • http://simkoongschool.com/uploads/editer/files/68964204294.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/29515893491.pdfIn PDF document text
    • http://adamslakeband.org/userfiles/file/mezavifetugaxetajasururad.pdfIn PDF document text
    • http://aahsclassof1978.com/clients/b/b6/b6117739535924054831d33ecd54b00a/File/gepesiminewezivekalavixeg.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc4fe3f91f---32178326768.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/2fe762647faebd2d104375c736be83aa/75714243905.pdfIn PDF document text
    • https://vibanghanoi.com/uploads/files/sixer.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/35597940759.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/39184ff7c02278f9f280475e1345bce1/sepuzojat.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607592ab3579b---nifaxomoxufosije.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/bobababagixonuze.pdfIn PDF document text
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/14141803848.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//49294084656.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/6ab357ab0f70ad4ee302d95bd4ea12b5/jozopukapukilazutofijib.pdfIn PDF document text
    • https://medtek.vn/storage/file/getuxatosuwegorik.pdfIn PDF document text
    • http://usmleworkout.com/files/file/zalikug.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/riferevajatuvugi.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9f158e7947---92042200224.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/qj2epj2tjv7oq3smug57dmcnl3/28774145917.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/28568988472.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/3tovma4t8g3d9u3do42bkbrhjc/23009833818.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///81795680308.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021061520210114.pdfIn PDF document text
    • https://www.marjojaspers.nl/ckfinder/userfiles/files/37183434827.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC8 11368 bytes
SHA-256: a4757cc363309e26a73e067a7ab751015171550bf743a68601b326e712c6fdac
font_01_sfnt_off0000e60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE20 16088 bytes
SHA-256: 4214c5a1aad21734fef60330360a9b76f1ec4c2e6ad364dc4f8f6246e57bd9b7

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