Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6dcdedde5cb3c7d…

MALICIOUS

PDF

195.8 KB Created: 2021-06-29 21:23:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1bfd7a167eb8cb5a305b83f376971497 SHA-1: 653f10f240b3e1800b68cf794aaecf5c6238ff1d SHA-256: c6dcdedde5cb3c7de5f5feef2dcc0b48f3168aeb8e8b5daf5d2a322f6341badb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to compromised WordPress upload directories, suggesting it's used to host or distribute malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9367

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://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f71fb9731f---miximugawusamuguxus.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5e112d7e0d---44242284145.pdf
    • http://tw-sincere.com/upfiles/editor/files/78485492659.pdf
    • http://bogelaipigeon.com/upload/file/pomapafuwaregevuzovixixa.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8f2b3e0024---66534250635.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/d166044ee93849e21a1066d0ce028491/50253443401.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/e27d95519f487202e3272dcf5c894aa4/fomivope.pdf
    • https://ebooksweb.net/files/file/20699050034.pdf
    • http://habitat3.eu/userfiles/files/22254964680.pdf
    • http://tksvolga.ru/userfiles/file/wuweketibavezidomi.pdf
    • http://goddesshair.net/upload/users/files/92555773655.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/7419ba9dc27b210f48205739d539fafc/bazekutufanapubojoz.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e69296ce5---dovajagupadakuve.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/53ed803c289ae6402bf8658299076a66/zigojesenusemareb.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160da1f49ae8ec---57177165144.pdf
    • https://hunde-katzen.at/soubory/nuvipuni.pdf
    • http://oryginalnedekoracje.pl/userfiles/file/lewijeres.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1f10e677f---givetopimije.pdf
    • http://web68s.com/upload/files/46866052803.pdf
    • http://gemculture.com/userfiles/file/fiterinasib.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081c93394118---98821975100.pdf
    • http://dispensapertutti.com/userfiles/files/fegadowaxulabasil.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608317254bdd9---golevulejekakufa.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d5626f178---59458201364.pdf
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/9mim0lvi0cfopt013thcf4apc2/18495433427.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=doctor+phd+meaning
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00025951.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x25951 16792 bytes
font_01_sfnt_off0002715e.bin
0e8225d85bea736718474b0f78a24b7150132fc8cdc464b6a8c44b6e9972ba3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x2715E 2340 bytes
font_02_sfnt_off00027b8c.bin
43bc7c8cc48fe8659623e2642d8a7561a7d08ab06023dd0726dfd7c19d7a1fa3
pdf-font-stream PDF embedded font (sfnt) at offset 0x27B8C 33512 bytes
font_03_sfnt_off0002ce20.bin
1e8beb03014ff63690bdb025f0aeb3eb9981af11c028d0dfc093a40a4e8404de
pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE20 10748 bytes
font_04_sfnt_off0002e665.bin
a82b0e560ae7a6fa0d576074a22bb709d8a6311b7075d3f21fe7387ad85a762a
pdf-font-stream PDF embedded font (sfnt) at offset 0x2E665 17488 bytes