Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbfc751ebadb8c94…

MALICIOUS

PDF

80.1 KB Created: 2021-09-06 03:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 763862ef6164b8f9a88989d889bd0763 SHA-1: 09ed9697fb80a2e3bd5aa478633af0648dcbc29c SHA-256: bbfc751ebadb8c94d795ff8549d5a8e88dbe9164356898d4cee04f7e3ead1017
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/778acc584ba3ef871c5793ccc7f25fbc/sipazafanosisulimifav.pdf In PDF document text
    • http://mywayrtk.info/userfiles/file/37909875438.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/bepekide.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/b7f8d96bb7224ce0ca2336025cb5539f/54494107213.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/pefirutadasa.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/9fb26442aeacc0ed29288ea68fd350db/pupofonotinerumibejiruwe.pdfIn PDF document text
    • http://ltptech.vn/uploads/userfiles/file/38736310546.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/botupijewe.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709c6ae285f---45318479848.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/45222987049.pdfIn PDF document text
    • http://grandrosso.com/js/upload/files/6650682659.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/a35af61d73685e121a4e0a5e250c6954/dazirixekofapumilege.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608e56cd8e207---mumoxugawi.pdfIn PDF document text
    • http://slkuang.com/v15/Upload/file/20218171133453919.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/4lichk7v6haar8232o2otbiisn/zowidibafovufiboroj.pdfIn PDF document text
    • https://iskoruma.com/upload/ckfinder/files/lowuzoxitupexeso.pdfIn PDF document text
    • http://logtech.cz/foto/Image/file/58905115324.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/5b29e328597e5d903a6794bec10905ed/22474204642.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff3a6c34cd---dedone.pdfIn PDF document text
    • http://anbao.vn/uploads/userfiles/file/bagure.pdfIn PDF document text
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160dae4eb29291---nopafurigamodexa.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/q5fsbui6nj9kcf1l8md8ql61bn/mifagop.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/89ffbd2cd34d0d5d6cdc9c4905c4fa55/13095444206.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/27962677058.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a371dda7d74---tetozujubofa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=beverage+air+mt27+manualPDF 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_off0000d521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD521 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED38 10552 bytes
SHA-256: 89d8141c47c9ab0403c8a341d6d8bcc6f2ccb0efefee151c2d837fb997d120e0
font_02_sfnt_off00010560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10560 17140 bytes
SHA-256: c21f6ebf68c9939bcbd58b7c924f93a09ca29c77dcf5a0647b06e6b233d781d5

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