Malicious PDF — malware analysis report

Static analysis result for SHA-256 1616fd6ea2fcedd9…

MALICIOUS

PDF

73.7 KB Created: 2021-09-01 02:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 63a2068f54ff0f8aa640aa5835fa4567 SHA-1: 06b839076e47f47f8e993ab85977e83a576e0c03 SHA-256: 1616fd6ea2fcedd9ade21498f10f6ff62b09fd7a93676155c469b9d9ef9a04eb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous links pointing to potentially compromised websites and disposable domains, suggesting an attempt to host and distribute further malicious content. The presence of a link farm on compromised WordPress upload storage and disposable hosting indicates a tactic to obscure the origin of malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://barrybusiness-crm.com/ressource/devis-photo/files/1996389447.pdf In PDF document text
    • http://stonestudio.pl/files/upload/file/wupolag.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/gijinado.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/61882970765.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/fagonovatamikapulu.pdfIn PDF document text
    • http://www.pics4us.de/userfiles/file/52634931035.pdfIn PDF document text
    • http://belv.ru/userfiles/file/mokusojevabewikubagil.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/35348305534.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/tusasibizepezevujuratefun.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/guvig.pdfIn PDF document text
    • http://teraval.cz/res/file/nikek.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/73731543178.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2529c09b3---pegodakobiwetenukefegov.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d85b0f15af---53630338349.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/dadegoxeguworeleferumur.pdfIn PDF document text
    • http://judyzscotties.com/clients/1/1f/1f1ef5c9f72ce0e5bea5babf356718c6/File/48718180253.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b53209502bf---65611053996.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/finuxugavepox.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/fenipuxupix.pdfIn PDF document text
    • https://polaria.cz/images/file/nagizuro.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/zutevigevodupifunafonu.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160990bd0db5a3---zivojepejux.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/26506953979.pdfIn PDF document text
    • http://onmamtour.com/FileData/ckfinder/files/20210821_A3AA2A77AF23BED9.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612812bfc519c---temejusajodotam.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eff742af5b---92502534408.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=spinach+and+chickpeasPDF 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_off0000c05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC05F 15980 bytes
SHA-256: 4becba01a0d958223af827f44823736d9b549bd7bca1e72f3efa6b202861df64
font_01_sfnt_off0000e914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE914 10412 bytes
SHA-256: a19f8c9f48df9ad1b3047313c2543e8d86c44e3ee6868efe1090b44b5ee41c17
font_02_sfnt_off00010091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10091 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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