Malicious PDF — malware analysis report

Static analysis result for SHA-256 0067a8700211e094…

MALICIOUS

PDF

85.3 KB Created: 2021-06-09 15:35:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 83cc4c5ca175edf65bfcf0ea1c9097c7 SHA-1: 052995f9fa520bcfe46e3f4ff74b1eccbae79431 SHA-256: 0067a8700211e094c730bfb6725f99a16693a666a2a4b905fd0575d5fa7738d4
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links to compromised websites, many of which are hosted on disposable domains and utilize 'utm_term' parameters, suggesting a link farm designed for SEO manipulation or phishing. The ML classifier strongly identified this PDF as malicious, and the presence of download-related lures further supports a malicious intent to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/uplcv?utm_term=ilayaraja+songs+torrent+magnet PDF link annotation
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc111a8a2e---somaf.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4adade969---fujevuvilosijigezipimiwof.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/62a7rhfa0aug2k1r1oe497tmvt/49680134425.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/zokezanodebelevokof.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfae003184---taneboz.pdfIn PDF document text
    • http://drironcat.com/images/file/71449842437.pdfIn PDF document text
    • http://muslimofwestbengal.com/mwb/editor_upload/files/11859999388.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/29953731598.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/fo1jr0uha5smu3urfju8v3p6d7/19559456996.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/d4c12164339afb1b38392488d96d08a8/jojiluvaloxukukujuve.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/jotozorunamani.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/82abef1ace58d7068d5ed2595d8dcc57/milox.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160879ec90455e---zojomaworujigisekijabuna.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/e666809cf77b5c00f05c2369e4545aeb/76947956890.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a905ace1164---xolalomen.pdfIn PDF document text
    • http://ldbell1965.net/clients/85689/File/46858697436.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082eff4e5ff4---65074125850.pdfIn PDF document text
    • http://beijinghuojia.cn/userfiles/file/koxogobilujanasutofegod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://remote.utorrent.com/tiny/WA00ZoIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FF 5120 bytes
SHA-256: de28faaeffebe31fb773257e876f9feb5f0c016eef6a0e1a7bbf243dd0e76949
font_01_sfnt_off00012263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12263 11100 bytes
SHA-256: ee3901500aa62b4e846f608c908a2e5f7cdbc0baf034d3a2cf962e6eac30581b