Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f1243ccac5971f7…

MALICIOUS

PDF

74.1 KB Created: 2021-08-28 20:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f24ad554ce880a21f4ffd33985eab0d1 SHA-1: b458d249684baf6550cd811ebbc7221feea987b6 SHA-256: 2f1243ccac5971f76dc327e91f60d868d9f46c1687cf4fb28787ba2528f08946
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links pointing to compromised websites, including WordPress upload storage, indicating a phishing or malware distribution attempt. The file's structure and embedded links suggest it's part of a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 6

  • 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.
  • 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://laborke.ru/uplcv?utm_term=the+reactants+of+respiration PDF link annotation
    • http://royalwedding.jp/images/blog//file/dibotesaxi.pdfIn PDF document text
    • http://glovimex.com/uploads/ckfinder/files/memesemazodiximolejoz.pdfIn PDF document text
    • http://annassteen.com/ckfinder/userfiles/files/72060815857.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/kojdr9cii4tsaot55r3pb65t91/womisalazo.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/fekejosetesopaliti.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/40746421172.pdfIn PDF document text
    • https://beautyreviveshop.com/newerac2c/userfiles/file/83202291797.pdfIn PDF document text
    • https://biocenfis.es/uploads/assets/file/26318943063.pdfIn PDF document text
    • http://healthywithhart.com/res/file/vevubomafalivanomivu.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/643jsu65kdhfbtnir4fpjq1s99/36272425598.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa04c571ab---76865792488.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6fbb9aea9---gevimunabomulex.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/73384200715.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/5199c203509003a413d98377242caaff/musafe.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/xupebilewugixu.pdfIn PDF document text
    • https://autopratichesas.it/file/36159624678.pdfIn PDF document text
    • https://nikolsbeauty.com/webroot/f/uploads/file/59787384532.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/3keo26kkj806vscj0ubg3ogk7i/45147625034.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/junebaxogafal.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d731027e63a---nawokidipoxatimile.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/saxakuzifejo.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/lefisavomagevezejosomovar.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210809135908.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/4c9706fe3efc9eb2307318823e564ccb/fuzefinuluz.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873866b266a---mupisu.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ed4cb44f7---funodevagofonoxanas.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607064442f7c3---serixumazujidiwazisidex.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_off0000c377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC377 10492 bytes
SHA-256: 69bcd71e01551e761fbd77803f7174d297626d0d4fa084853a72a183fb3fb8f3
font_01_sfnt_off0000db4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35E 15248 bytes
SHA-256: 8656409b1eec9b3cd616b755ed3e7b20bff45fda322a898f1af2b52bb46ff4c1