Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e57005038d8106…

MALICIOUS

PDF

99.7 KB Created: 2021-09-05 18:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f7b5b4d8ccce803fac6b69b546361af1 SHA-1: bd463d47bf319f7b77fc93b718cef32c4151654d SHA-256: 38e57005038d81067a1e0ad019210e8de2bfb099c447d7f0ff981bf99a17edce
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection to these malicious URLs, serving as a downloader or phishing lure. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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://drafthe.ru/uplcv?utm_term=vade+mecum+2018+juspodivm+pdf PDF link annotation
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/77420703661.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f3d435182e---kejusutilewixab.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/49879012703.pdfIn PDF document text
    • https://galaxy-training.com/userfiles/file/jeratosixiwab.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095cd2b9d926---42525728279.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/79d24778fadb9a654d665b3b27c6fcfc/bunopopulapelevofirepe.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/vegal.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/33950069666.pdfIn PDF document text
    • http://fruitsad.pl/images/file/fojamego.pdfIn PDF document text
    • https://congchungnguyenlieu.com/uploads/files/gopujilasav.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081e4e1bd1c1---jedezesizega.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0842b8aeb---parijogamupisaka.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/dbgmggbjg6e3akb40usq2brqn4/90518515930.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9a9107a98---gonubikimezimeza.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607806325f345---lugobaxibetek.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a40e4b02ecc---71121325620.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/f75d18bf88bcf0d6114de49ad4cf17a2/3662052830.pdfIn PDF document text
    • http://sun-green.de/ckfinder/userfiles/files/wobapesa.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/90715508644.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/zedorezujisevogi.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/53618507639.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/25ngii55oleu1to6qnnqf1va3l/50841306939.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/7a647ddd80b2c96f1fd196eb35db28c2/namiwasodevoz.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4d846c0f62---43793802004.pdfIn PDF document text
    • https://eviinstall.com/userfiles/files/xavedowagozolejanibapas.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/83082927823.pdfIn PDF document text
    • 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_off00011ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13707 18644 bytes
SHA-256: 50dae9b7ff710734da78b96ba04d49841243e8575fcf8abf68e41650608ae64e
font_02_sfnt_off00016507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16507 11200 bytes
SHA-256: a65ada305b772b12a84c2efe3bf3aa3da1076b77fd672db2e550177d73f19f80