Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d2f62ef83f93d0…

MALICIOUS

PDF

79.8 KB Created: 2021-06-23 02:21:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1c6a25150046f88adbaf81edde395319 SHA-1: 9b42af878c8c02809a386b7602999d70441b6744 SHA-256: d7d2f62ef83f93d0b2a7f239bc1ae0d4df608f932f7f02b8fa9d8adf5c416d20
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and appears to be junk data, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16079683d7e3eb---9328142680.pdf In PDF document text
    • http://naturallabs.de/userfiles/file/42257395596.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/ab956702e6b3e51292daaa7c550796a8/wasufarafadulumiwi.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/63730dasl2jbbfoainr2qqilgs/wileki.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/80962217188.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/71075374028.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9f2ee571a---dikabibije.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/ee9819e3afe8ab5a7e9e3f27889885d2/11091753031.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/57368788093.pdfIn PDF document text
    • http://bendhorseride.com/userfiles/file/kumadoniribuzibok.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/e290e79a674a7b2f2dbab69917f746cf/wixufopurux.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/bagolebubijexa.pdfIn PDF document text
    • http://www.retorika-zidar.si/ckfinder/ckeditor_uploaded_files/files/vunareweruxadufelalo.pdfIn PDF document text
    • https://lecachet.fr/docs/files/57735118896.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/nimojaporonatafamawafomo.pdfIn PDF document text
    • http://jiangsutravel.kr/userfiles/files/20210607_200346.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=grape+drying+process+pdfPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD1 5424 bytes
SHA-256: f81e641a0af3bc6aab9c74deae995f75d4ee1c5624bad6916e59b38f4cf3339c
font_01_sfnt_off00010d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D64 11016 bytes
SHA-256: dbc27587bc8cfc7e99e60ea64f5a6bdb116b3ddcc35faac568b1d5d422574d80

Open this report in the interactive analyzer, or submit your own file for analysis.