Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae0f14b0c082ee1…

MALICIOUS

PDF

85.2 KB Created: 2021-06-28 21:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 88a05ac589789ab3f2432018e08a2e6c SHA-1: c994f625b5800a09d661125c61414726e9affd8f SHA-256: 9ae0f14b0c082ee18f0865b3dcfb1660d8ff64873b84debf8301903c1d92ee1e
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://airflow-skateboards.com/upload/file/puxijodosowadanikeliboba.pdf
    • http://bbu.vn/Images_upload/files/48154338497.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608382576bdb7---18234012441.pdf
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/3b330ffbffc7437984d2373cac5f2391/68472667733.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/vi2brc70nqp4c5pdpki7c6qo95/bulewogitubenibuwapi.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/ukbvnfgc5o9jh0jprj51tvc66h/kavosa.pdf
    • http://jl-vacuum.com/upload/files/nikenupitopobavuwov.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc958026eb---42552048550.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4f39cc433---tefoxivolulezo.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/2f54b4b77db5c7d47f75775a1a255510/nofexiku.pdf
    • http://ceramicaartisticamarsalese.it/userfiles/files/pefugegakilotuborogug.pdf
    • https://digireg.org/upload/62159337738.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/b7fa150b6ba2eab8af9328689703b256/95542395417.pdf
    • http://andrelandberg.com/userfiles/file/99008182931.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2f0d7046c---88155486563.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc092602d4b---5332896448.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/qogcqd2v3fhf3qguft2t93ocf1/45499671802.pdf
    • https://arhometutor.com/userfiles/file/15124174580.pdf
    • http://jshtextile.com/UserFiles/file///jabomimuvoxa.pdf
    • http://massvt.sk/editor_uploads/system/files/xasak.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/a0bfa429333b13e111d0b129fad570d3/rixapexi.pdf
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/684ff8ac5d570b469d931fb859c69352/waxopub.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079a03a17fe0---66517566169.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/1376b02c3c50037a28167c42751e8d47/95256627062.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b83d149bfc7---92047291378.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=12+commerce+all+subject+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e947.bin
b843af34dd53fd345975c1bdca4a1b54552e9b0e396ffea1ffe598d1f4f211a3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE947 11028 bytes
font_01_sfnt_off000102d8.bin
66d2d6e4b012a75f0b358fa4072ff4ee9c2226cfbd8edda1962f80bf3eaa7065
pdf-font-stream PDF embedded font (sfnt) at offset 0x102D8 17040 bytes
font_02_sfnt_off00012f5b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5B 16792 bytes