Malicious PDF — malware analysis report

Static analysis result for SHA-256 118820d85d3ca20d…

MALICIOUS

PDF

80.5 KB Created: 2021-09-09 17:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 448ac0914849efbf9fbf07dc688ee673 SHA-1: 2bed6aa4616f2a0fd7c6d710fc5df55ee1ab78bd SHA-256: 118820d85d3ca20d1d25845a0b7d8a8c3481b69d16e297e08e4c8cfff3d2f557
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains embedded JavaScript and a link farm pointing to various PDF files hosted on potentially compromised or disposable domains. The presence of embedded JavaScript suggests an attempt to execute malicious code, likely to download further payloads or facilitate phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/39659212006.pdf In PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133e134ca073---16647023658.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/2af11f1ecedfea566ecb2ad012a874de/lefejibatumep.pdfIn PDF document text
    • http://vers-ma.de/userfiles/file/40329785844.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/zobopurin.pdfIn PDF document text
    • http://www.nachtruhe.info/up/files/45528546916.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210901100351701.pdfIn PDF document text
    • http://jfe.hk/userfiles/36109584753.pdfIn PDF document text
    • http://acril.ru/ufiles/files/jedajexesulebafelilixike.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16139f6a0104f3---28727354556.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/goxelali.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b2b53abeb0500ca499aa3fea9c7a372d/61715513093.pdfIn PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/13870344743.pdfIn PDF document text
    • https://kiofruits.com/admin/uploads/files/vefupoxenax.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/daxipexegalasewujop.pdfIn PDF document text
    • http://suarezbeltran.com/aym_images/files/60494159320.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/41853247200.pdfIn PDF document text
    • https://lawtutors.co.uk/js/ckfinder/userfiles/files/99355496253.pdfIn PDF document text
    • http://whatdwellswithin.com/file/42921114221.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/rorewerovasumuluviretu.pdfIn PDF document text
    • http://ccsl.asia/files/risosadobuzap.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137fdf9141fb---12947397718.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/a9f33b39d08c6a9104820ce62cb7b3d3/matugumo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=vip+apk+downloadPDF 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60D 18620 bytes
SHA-256: b2167d6ff13d0785be017697a45baa0f88c96156ca896e3085b6b79b3d9f33dc
font_01_sfnt_off0001067b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E92 10036 bytes
SHA-256: 932b6b4ee4cc8e51baceeac2c855542a53656235763c38ca22ee4f10650fa3bf