Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6a6c4e35305bb1c…

MALICIOUS

PDF

247.9 KB Created: 2021-08-17 10:26:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 88428f589962ba42f02fd7bdc47a31df SHA-1: 9a9c7e23d54d5feff1b60c48213dfa67e6e5e15c SHA-256: d6a6c4e35305bb1c0677dfe438f592001e138259d67c6a84a75b1ffcb4fa085d
126 Risk Score

Malware Insights

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

The sample was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, which likely serve as lures for phishing attacks. The PDF structure itself does not contain readable content, but the presence of external links and the high confidence detection indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9752

Heuristics 5

  • 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.
  • 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://gazomotor.com/allinone/file/68863483746.pdf In PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712fb078774---lomuvazilajinupig.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/janimunujarafowalasug.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/16017037927.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/42345726752.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/mjss9eqbqv0aakvibof78kouf5/51734133539.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/fixewafitaluru.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/54kufs5fmu94m8mhk811vqvck1/49346731187.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160986a828e515---zepopugosepe.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/sewalotubonizo.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099271a27a5f---23788330939.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/74839337706.pdfIn PDF document text
    • http://alphaconsultinggroup.us/vpw/images/file/8020850647.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/62019625588.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edef07e98d4---9821384165.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/lewalavekawuwa.pdfIn PDF document text
    • https://byocamacho.com/ckfinder/userfiles/files/zinoresubosunefunujutuze.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/add4db83cb492c9a93798ff3911c16b7/modasevanebu.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/mimase.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/m4micq5vnjfk1pda8890fii2bk/kagutemefogovokegesolug.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/9d6d0dea6934337dc55034eec63a745b/sasigabimokude.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c79fc8478f7---milaru.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9440473b5---76724362077.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/11e41d3ad111758e3de4dd144086170d/55241760361.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/juduliwokaloluvesi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=semiotica+para+principiantes+daniel+chandler+resumenPDF 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_off00036cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36CC2 10956 bytes
SHA-256: 0fc4edb39a49067b5645ed9dee54f2005bd333935c2a1a0920283988497e6f25
font_01_sfnt_off000385e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x385E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00039dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39DFA 19240 bytes
SHA-256: c2c555a97f8d1768dd167c8a173d74c885deb0fb26049a5b0f2bad19c731b224