Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a3d949d6161e5a…

MALICIOUS

PDF

69.9 KB Created: 2021-09-26 00:35:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3155645dc409e3a2157b7ed6a2374755 SHA-1: 4e4a6b38c03afeb16ff17c66a3339a6b71802db2 SHA-256: 89a3d949d6161e5ad7cceb48b097c95b3428e24ac3131895423850e104cf027d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and multiple external URIs, many of which are identified as a link farm on potentially compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution by redirecting users to malicious sites. The embedded JavaScript is likely used to facilitate these redirects or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://cattaneoarchitetti.it/userfiles/files/86937212757.pdf In PDF document text
    • http://efuegypt.org/userfiles/file/tiluw.pdfIn PDF document text
    • http://korsorlampang.net/user_img/files/94091574881.pdfIn PDF document text
    • http://accutindustry.com/Upload/files/20210919085531.pdfIn PDF document text
    • https://dacola.com/upload/files/67629058049.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/53038231623.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/a25972b80f87b71dd2cd3c14f9ab39b2/27133729300.pdfIn PDF document text
    • http://syntrend.critical.tw/upload/files/gasuvudajexojod.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef811db921---60002721678.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/balitiferitolim.pdfIn PDF document text
    • https://sabresources.com/FCKuploads/file/gojetosejelurejege.pdfIn PDF document text
    • https://rajatotogroup4.com/contents/files/pujap.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/70627125222.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/283a4b50b178e9bb459e51c996442317/duginajebilexepuvo.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/ligaxa.pdfIn PDF document text
    • https://suzukihungyen.net/data/dulieu/files/54624813490.pdfIn PDF document text
    • https://mediaskills.rs/files/viruvobomaweguzegir.pdfIn PDF document text
    • https://sudhirsachdevaclasses.com/ci/userfiles/files/numarivun.pdfIn PDF document text
    • https://digireg.cn/upload/17253076645.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16141731cb7342---dapenalav.pdfIn PDF document text
    • http://48bulls.com/js/upload/files/bekutovej.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/sadebugirebi.pdfIn PDF document text
    • http://nmways.com/uploads/fckupload/file/68156539902.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/fifugojitikejiwimaridora.pdfIn PDF document text
    • http://intertravel.hu/_user/file/jefiwarig.pdfIn PDF document text
    • http://bronnicy.inhome360.ru/admin/ckfinder/userfiles/files/4869661429.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+get+free+wifi+password+on+android+phonePDF 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_off0000b434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB434 10808 bytes
SHA-256: 5be5bc98bf24e57b37e867908adc6ad47b5c681a93cb98780e55a7f62ebb8664
font_01_sfnt_off0000cce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F7 14564 bytes
SHA-256: 4cbbba6f31e711ff43b55c99dd1b4e63eb54ba8ea30f864132ac5e6b0c43c08b

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