Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e59541c63773df…

MALICIOUS

PDF

90.8 KB Created: 2021-09-18 10:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 47e2f1f2303c9d91d25d7909f525c0a7 SHA-1: dd1e4b2fcaa4c02fcbe95827f0c55fcc87c954e4 SHA-256: 01e59541c63773dff84d20e1875114ae04f1421a14a93537d18fe8a6f88c2a85
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and a large number of external URIs, many of which point to compromised CMS upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://garglob.ru/uplcv?utm_term=przypominacz+na+androida+po+polsku PDF link annotation
    • https://geneticapanama.com/userfiles/file/79406692689.pdfIn PDF document text
    • http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/44162221943.pdfIn PDF document text
    • http://alanaf.ru/userfiles/files/59799546775.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/6f25854b892368e21867a75778480f5a/litumozamagibolad.pdfIn PDF document text
    • http://lagostena.it/userfiles/files/fokexararu.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16144943e73187---65886080691.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161374c68ef971---xelonok.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/27113050549.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134deb35c56d---92413822860.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/vigowosowaguduluwisetuvuk.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/7e38e924bdcf071bd1a1908922855dac/52383140462.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/48365564621.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/gabk76mp3p2s1j99hn1hku8600/mujetetejamegake.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138174341311---forabafitunodutedami.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/34433579837.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/2021932234145404.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/32118111742.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jilotol.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/38330057523.pdfIn PDF document text
    • https://promobryansk.ru/userfiles/files/pajapalikatuke.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e8c050641---zodetoxugatujirad.pdfIn PDF document text
    • https://edusfera.pl/upload/file/fumorumitimumabe.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/visejolawemebupix.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_off0000fbda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDA 18752 bytes
SHA-256: 564c71b3453c514a0df507ee5a05fca1d0aa7530ef9d22a8ffa1365f8b61dc85
font_01_sfnt_off00012ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD1 10812 bytes
SHA-256: cf2a8ad49c07bb787395616758e944b32f5c73dd735a043b1845caba3fa6f563
font_02_sfnt_off000143bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1