Malicious PDF — malware analysis report

Static analysis result for SHA-256 74676f402b59f9fe…

MALICIOUS

PDF

87.3 KB Created: 2021-07-19 12:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 94ab98e0dff6b5eae1a5039c3cc73a31 SHA-1: e5e9a8888fe504e600e4352f34e5fa51e3dd25eb SHA-256: 74676f402b59f9fefa268c8160914b2c8109e9991c8185cb3a28c7a590ad7d07
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories and other potentially malicious sites. The primary attack pattern involves luring users to click these links, likely leading to further malware downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://bajajsports.com/userfiles/file/zexisilejokud.pdf In PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160824d7cc8ab3---zaxufafepuxosiwitito.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-4-30/20210430065426506531.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160922bb9d4bf3---13766205337.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aacf0e29db0---woruvoxipixijuruzewogu.pdfIn PDF document text
    • http://candemdientu.com/Images_upload/files/bowolu.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/dikutapemabum.pdfIn PDF document text
    • http://instandee.com/Images_upload/files/76407359225.pdfIn PDF document text
    • http://mrbossamktown.com/uploads/files/78881263640.pdfIn PDF document text
    • http://marsalanoleggio.it/userfiles/files/gesowawo.pdfIn PDF document text
    • http://giaodantanthaison.com/Images_upload/files/48673677471.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c158985b6---97350140237.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb5bef4170---52136532520.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160821ef40da33---pizodafuwogadasora.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/25225236845.pdfIn PDF document text
    • http://greatnice.club/updatefiles/file/70184702693.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/6c64162a2be5286957d5da497aa76181/bujafizolokovib.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160c719a199db8---vupipobul.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609483e1eeebe---lipobepajojimozebeguto.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b40b7b974a---kunepib.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/u2a0efinahhmpif1n2dqg5a099/lawasikuxazez.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/6m3g0ieslk5cmkejf9ooncpvu5/lifefumefe.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/28562615998.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/d2dvbt0dvbujfcq7u1meha848e/39878575648.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089328d2c475---nitunudubokuzebelerafe.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/73629784318.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=binding+of+isaac+switch+console+commandsPDF 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_off0000ee63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE63 18104 bytes
SHA-256: 46ffd053ebe2cd36104f13ba88e1b39a9d614d20ffecb68dda9cc86bf4828e84
font_01_sfnt_off00011e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E30 10964 bytes
SHA-256: 9766e51b4f9912fddc8eb1db76a0cde073ebb94465bdafe2ff079d9cd97475ec
font_02_sfnt_off0001374d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1374D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1