Malicious PDF — malware analysis report

Static analysis result for SHA-256 93abf8af90df0b1e…

MALICIOUS

PDF

75.6 KB Created: 2021-08-17 17:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 28d3aa3e52ec6866cd82ac568ffd577c SHA-1: 04ee42d9c6979fe3581d1e5b91c2edcc175e9e5f SHA-256: 93abf8af90df0b1ebaf127d977031aa979dcae07431a30c83c237d948a8266e1
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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 http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078279e6a9db---78535632238.pdf In PDF document text
    • http://greddy.com/admin/common/ckfinder/userfiles/File/89075215716.pdfIn PDF document text
    • https://leanuslab.com/UserFiles/file/vogudixizifogi.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dd1d84249---zevovuwexakufubovi.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/c8aea76b2c73f488f64b5c8e2c3e8562/6746957141.pdfIn PDF document text
    • http://bronia.org/userfiles/file/51947293816.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/gonaxegepimutab.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/29007778959.pdfIn PDF document text
    • https://sakura-bashi.com/uploads//files/202108091247105246.pdfIn PDF document text
    • https://bursac.net/userfiles/file/62750264491.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/nq7bojsl2b8vrg4fci3ggdmp0r/siligenemasatadonovobemi.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/34366018462.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/moruwubizuzame.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/59r8j48v972i3ah23i5k8p0do2/wigezilusupopulajarobiv.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d8ca0d40b24---29852790753.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/3bqig0gecv0ltd4vtd29fptpg4/28813036476.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ff17a760351---55411683746.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ffda48e4b7f---43174397871.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160af760780c57---vavodozunul.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/panewanagub.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb62b9b261---japisina.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/8b2531d12720a3743bcf09732486ab46/57624885386.pdfIn PDF document text
    • http://betenenergy.com/sites/default/files/file/31669288615.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=kimyasal+t%C3%BCrler+arasi+etkile%C5%9Fimler+%C3%A7%C3%B6z%C3%BCml%C3%BC+sorular+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://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_off0000bf57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76E 11756 bytes
SHA-256: 4ca3d33fea941af1935cb73a66fadece4e80dae188954e8cbdcce5b8fa1a6480
font_02_sfnt_off0000f226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF226 17760 bytes
SHA-256: 4aa6585017a6e33b13ebe3c62e8e267a1d8817d85cbe4687f1eeaec8d255bd90