Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2c7440e58cdc984…

MALICIOUS

PDF

89.7 KB Created: 2021-06-27 01:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c550069a5cc97e8ac1fec83c668407e2 SHA-1: 4fa7b640fb1c344c7f8e2e7c2a47b807933b2f1e SHA-256: a2c7440e58cdc984c6866477a331805cd6d78a0dc560fe13d5c13307950605d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of external URIs and link farms indicates an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://huntic.ru/uplcv?utm_term=red+eclectus+parrot+price
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3666ddafdb---davesaxazupadobu.pdf
    • http://safeabortionnepal.com/userfiles/file/22589840583.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/7ae8e6e20da0e89876791bacb17ccb46/91001358456.pdf
    • http://ferrogep99.hu/static/media/file/89409969291.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/088bcbfa6858816d1eb47682e3b58cc4/77858829307.pdf
    • http://davidhammerstein.org/userfiles/file/momesufe.pdf
    • http://aihyang.com/userfiles/file/tefetiva.pdf
    • https://novahealthclinic.ca/userfiles/file/vumuvepu.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608edaaf314fa---tobal.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607587ba9e4d3---779672255.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/23dc3c72734a5226e0b5a3ad9d6d7f0b/pogudarubagezis.pdf
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/24730316852.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/90e7da9a6cdf5c61d101e7b82d5fffcc/43698313595.pdf
    • http://hrjok.com/uploadfile/file/89222562927.pdf
    • http://barudan.hk/UploadFile/file/20210627050149299.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608180c26363d---saronazazewipapotoja.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/96c6b22a5a1d3ca5ed86851a332a36c9/74167395099.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16078f731a9ad3---88618767536.pdf
    • http://cnp-inc.com/ckupload/files/taxoxuf.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/31d04ddb39005511ed2a0bf036324df7/90490654743.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/ef14bdcc52e8a942925f2fdfd65dc3c9/pipisukaravugigu.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd405ba5fc---loxofowibivax.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160830c47a25c8---63334887235.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb19.bin
744e920bd8676b19b2f4182cb5b4961f440a0ec37ba12036d2f57b51d6ae754f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB19 17024 bytes
font_01_sfnt_off000127e1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x127E1 16792 bytes
font_02_sfnt_off00013ff8.bin
1e60e8577eed3d13a8f3d0c252947ca063371e11ea72cce9e5e8b96eaaa035ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF8 10548 bytes