Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d0c2dc4edc19fb…

MALICIOUS

PDF

113.8 KB Created: 2021-09-01 01:36:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: aa3a7ab97b32a35fbb008bac8ce817ea SHA-1: ea83130040f2f1d9ac9c1853573f5287a77719ee SHA-256: e2d0c2dc4edc19fb3ad84c562f925d5dbda20ae163d0fb2f6fce192593345158
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDFs designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • 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.
  • 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=tds+on+fixed+deposit PDF link annotation
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16092b9a34bcf0---lupuzoliwodowumerim.pdfIn PDF document text
    • http://toyotarent.tw/FileData/ckfinder/files/20210626_D07548F7C8A9699F.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/0d242788c7afa741773f63c8d0fe5224/tujidobitigijif.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/64600605218.pdfIn PDF document text
    • https://monyetmesum.com/contents//files/55400692966.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0e6b2f233---bekemig.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/c45df977700d983fd1e31380416be0fa/neredutorufonez.pdfIn PDF document text
    • https://usssecuritate.ro/userfiles/file/49617289828.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/bb6d674e412e85649d2c7db07af50ac3/91472621114.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/revidi.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/73206380131.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/52601858485.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc0a5dad81---pepadowupizizako.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/desizene.pdfIn PDF document text
    • http://whalesart.com/uploadfile/file///2021063004095210.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210506231249_1874073343.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/vobozo.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/33530067f208ebff0f48b8ad7e1bfbdd/28390127187.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/65412255160.pdfIn PDF document text
    • http://www.stemcellhairclinic.com/files/files/65108561181.pdfIn PDF document text
    • http://eldorautomaticgates.com/UserFiles/file/tibagumagadike.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd15aeaedb1---21508527567.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/wukenuwilipiwinarupale.pdfIn PDF document text
    • http://anm-av.de/uploads/files/34041385259.pdfIn PDF document text
    • http://sweden2020reunion.com/clients/e/e2/e2375cbe45a1e08e95d3a39ca41e84e3/File/wujebupewumuxobunabet.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_off0001586e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1586E 10248 bytes
SHA-256: cea20a918db1a35c771cf5d935d8e7725e2cc3a5550434336285a648fdda97dc
font_01_sfnt_off00016f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000187af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187AF 18748 bytes
SHA-256: 0902ec589afdfbab328f494727de8f0f39b70d8b017e5faa617036133806e805

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