Malicious PDF — malware analysis report

Static analysis result for SHA-256 074cae1ca6b6ebaf…

MALICIOUS

PDF

221.3 KB Created: 2021-06-26 03:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3e8417464ee41cdf897052bc3ae4be1b SHA-1: 8ed974c28afec9978ceca840b3d8fa0e61960594 SHA-256: 074cae1ca6b6ebaf4dd3d633d1f11358c2670a3aa7724a9ece4a7b182455ed56
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. The presence of a 'Password-protected archive lure' heuristic suggests the document is designed to trick users into downloading and opening a password-protected file, likely containing a further payload. Multiple URLs hosted on compromised WordPress sites are present, indicating a link farm used to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9772

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609455a726985---86216178942.pdf
    • http://whalesart.com/uploadfile/file///2021051515152190.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ce3539bfa---tonudeten.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb198be15a---zipuzaxifagogetodamajuxi.pdf
    • http://446888.top/userfiles/file/rijewutokopusa.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/cf1dbb4bb21a9330dc8196271b919140/bobukikuduwonazi.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa51782b6f---11818926942.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d927ab4fc3---pamavijogeva.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160acd18780614---48870802760.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/3d44e1feb39ac704b5851b1ae99a426e/sesefamudumulijib.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/1pl9p9jmqi2nua13br5goede8j/22833233977.pdf
    • https://palcev.ru/userfiles/file/rufoxezanikeda.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c634479f---jisekejugorowajewenazej.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beef1dd8f63---12632002270.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/b805c0f09951b926d718ee454a1afe66/33925670528.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/0ee41e487ccd1ece99b469796bb35d33/nebuvewajarezodizesunif.pdf
    • http://gtshotel.it/images/file/91313352215.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb3ea4e650d---gudeganujaxujalopazetano.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4283d14b30---bugubinakutufofuxiro.pdf
    • http://maslag.eu/userfiles/file/mazanakajubasoluri.pdf
    • https://hgb.se/filer/file/wuduri.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cf5f1704f55---38147535258.pdf
    • http://sjar-tech.com/uploadfile/file///2021051614522888.pdf
    • https://mmagame.com/userfiles/file/vuberewozusimetegu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=george+nelson+o+brother+where+art+thou
    • 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_off0003090e.bin
57f2a4f4e37c8cf7566b036b1dde514a8a69326a2e75067b2e83e79020c219b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x3090E 17528 bytes
font_01_sfnt_off000336c8.bin
c0109cdc8fa760b84f3a485acb15a1d1b62caeb8ec1d4d7ca4b9e702ef11abbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x336C8 10660 bytes
font_02_sfnt_off00034f4b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x34F4B 16792 bytes