Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f75e38665c01ff2…

MALICIOUS

PDF

54.7 KB Created: 2021-08-15 04:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7a12dbcf38467fe20a17384a23c6ebd5 SHA-1: 076704912f082fb559c03ff245eb4bfabd4769a8 SHA-256: 6f75e38665c01ff2e7fb0035c41f80667c71aa39cb99b20fd5f7e3a7608fb52a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware delivery. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9376

Heuristics 5

  • 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
  • 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://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7t2l1guuaj57bdfllos6u2ppk2/vetarewosokekejiso.pdf In PDF document text
    • http://xibuhuanyu.com/filespath/files/20210806153335.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607095c4c911c---gaxusamil.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/ee86275871f8ec7df96acf3f7a48458b/rofinexokotenefepum.pdfIn PDF document text
    • http://eventclub.pl/userfiles/file/43438822781.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/bakafiwerixo.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160769e8b91e43---nepabowebilitage.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/sanajefusuxig.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1611444459989f---46099904574.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/kotadarosawebulakufume.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/gazofozedavinegizogox.pdfIn PDF document text
    • https://ka-base.no/images_content/file/zupezaxividitasigopokifu.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/837394c958bcffafda8f4594e3a5a0ca/fumoni.pdfIn PDF document text
    • http://amandamaitland.com/images/file/61306190143.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/sogapozibivujatotogo.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/sekubidujesedaxovufazuvow.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/52340616154.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160f99c2c7cec6---40161902928.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/667aafc100dd2379ca196cd0b7b1437c/64994917308.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/cc7e9a4192f8da7f32db55d22bdd5c0f/30195848457.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/36799535035.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/a8b4e6901406afc80c3df609b5477dab/5453642812.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/rufubilolosebupu.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/388d9a77165604ab8a90fb78c3fbf524/11526875740.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8b6b86783d2abd9faedefdd429fe7cc1/xinaxiworuguba.pdfIn PDF document text
    • https://basealimentare.it/webroot/files/fck_uploads/File/3153362901.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=comparative+and+superlative+adjectives+videoPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D3 11000 bytes
SHA-256: a33cfe6ec44a1cbe894f530d5aa47baaefabc6df67e373fb18c77a906fdb5d27