Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0cefff467f52e9…

MALICIOUS

PDF

90.8 KB Created: 2021-07-26 16:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3d5f7d8b5b118159b836b61d2774c829 SHA-1: e2cb4f6ed451ed4706089cb558674b0b15b7c862 SHA-256: ab0cefff467f52e9523140214aba08d4ea65911c13fcc228fdb128b1728108b3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious files or conduct phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the download or execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ed5848dd7---39148804381.pdf In PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b092b3d3232---87521381635.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/kujetorokenapunefokagomen.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/xurotanamogiv.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/5eb55cc5f8ee5cc4b013cec69635eeb0/wakinusujobadejinile.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/pupowototefupokamomosune.pdfIn PDF document text
    • http://k-ookuma.com/js/upload/files/53331802835.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/d12ceeb68fde25b95071364da0e6f4a3/diwutogosugelopijunexad.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/9735142125.pdfIn PDF document text
    • https://austarpharma.com/upload/files/wiruken.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/4cdd89943f206a7e164e2d0dd225ff0b/62862119748.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b55da53dceb---jorazeja.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a715ceacaa4---56284271984.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160878cd3a7b66---zerunebifipodofexed.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070fc8b1bf08---87275710733.pdfIn PDF document text
    • https://asi-filter.pl/files/file/22307376848.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/8117b9baa177f5855cecf5b5f83439a7/81082042123.pdfIn PDF document text
    • http://mashtalkandil.com/userfiles/file/juxesavilowekizefepox.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9ebc1a1aa---2772131429.pdfIn PDF document text
    • http://pho32shabu.com/uploads/files/17994192402.pdfIn PDF document text
    • http://technocom.pl/editor/file/dibavunalasujaxibaxivugi.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/5l9ffoaojf1m73143m05dq3do4/zawodododelara.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/0d1827211d1a2cd2dc47fe72490e9551/32008117809.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/2d62c67a5e32a242b7f361aad5ff19ea/tatuvezewuzufuder.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/0d48aa2a85d93f4a932794cdbbaa91b4/leziwevenoxeripak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=malayalam+movie+free+download+appPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/44820854751.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_off0000ffa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA6 10652 bytes
SHA-256: e91e9ecab85b365dfaf9f0b9ca57177a482567d545dd84588cfd5c8d54d6437f
font_01_sfnt_off000117fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FD 17028 bytes
SHA-256: a84127f2a38784b1ec326fba99f4bd4467bebb93056227646e68e6b8ab77e33b
font_02_sfnt_off00014465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14465 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1