Malicious PDF — malware analysis report

Static analysis result for SHA-256 2980147cb2569bc8…

MALICIOUS

PDF

79.7 KB Created: 2021-09-17 03:11:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2fda230078e7d9486527153a51daa9bb SHA-1: 10b6b31c70abb9fac6e05a84a9d7817421956aac SHA-256: 2980147cb2569bc87d752f3280c695b75f75de0e3f3aa92b0508d0f0722cd05c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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.
  • 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 https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/151e115c733badf0f9c66df36882e5a6/95293910944.pdf In PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/nelozowudob.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/hf4f2li8fnjkiqcrvief2aji12/losoderaroturomowunali.pdfIn PDF document text
    • http://adhdesign.de/userContent/files/20210908052242-latozidutibe.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/fulololomubufujiluxu.pdfIn PDF document text
    • http://finalbrand.cz/upload/file/nakozonunedez.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a030386668---monuxavox.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/ditisanibaxisazajuve.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/0bf1c3054c740ed1765d51215b741952/56462912244.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb4273327a---52098300513.pdfIn PDF document text
    • https://0900107678.com/upload/file/dopafoxe.pdfIn PDF document text
    • http://skyrun-arser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/2109141651550879025ybegf.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/60688234723.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f402664ebe---66066398196.pdfIn PDF document text
    • https://gifarlcm.com/upfiles/editor/files/44253982377.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/nowifaforawolan.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/f8c0b813fdf7d7fd35d4da6fbf372f9e/dubexifopipemogimefazakub.pdfIn PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/35411747075.pdfIn PDF document text
    • http://sigmabhp.pl/userfiles/file/66247044321.pdfIn PDF document text
    • http://fgsconsulta.com.br/ckfinder/uploads/userfiles/files/32270782752.pdfIn PDF document text
    • http://askaudit.ru/price/89666382392.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/rexakazowo.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/29306711453.pdfIn PDF document text
    • https://kenkochaya.com/user_data/ckfinder/files/69896193555.pdfIn PDF document text
    • http://chukguwang.com/files/fckeditor/file/vofizabinov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=web+browser+available+in+android+is+based+onPDF 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_off0000d581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD581 16796 bytes
SHA-256: bd83671fbfe2f8ebf72e23d3b14a6848f26e52865c51758eb580ed3b13527166
font_01_sfnt_off00010107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10107 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001191e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1191E 10428 bytes
SHA-256: 802a59def526e9329eb9087ffbf1ed067edd92fa3a064d4ac0e5073addb38dee