Malicious PDF — malware analysis report

Static analysis result for SHA-256 7124f1ecc89eca0e…

MALICIOUS

PDF

87.6 KB Created: 2021-09-03 01:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1204eae39aeddbb8376d7bea77ce32c1 SHA-1: 6f2ff03c405c7b882ef36d8ef266579d23923a55 SHA-256: 7124f1ecc89eca0e2720bec23ff1ed6e485db74135611c5fb8f6553a6adac308
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by a machine learning classifier and ClamAV, detecting it as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised websites, likely intended to lure users into downloading further malware or visiting malicious sites. The presence of multiple links on disposable hosting and compromised CMS uploads suggests a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/c2e4de12c51b2f09a96084f4ce0fd4e2/1289362286.pdf In PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/161079906d07cf---87485947162.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/b364vo8l2pnpnc4seidd734tc6/15355557892.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8ee7293cf---ripuvexutulu.pdfIn PDF document text
    • http://st03.it/userfiles/files/zexebibinuguzeruz.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/161198cd9ed09f---bukanun.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/a7ddd8f79879b08cacf6c5da8cfe335b/85815800297.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16088cc3a42c47---texufasusiwedek.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/14627389197.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/4fd94a3ba127462cba249195acc7f421/24585559345.pdfIn PDF document text
    • https://capital-tic.com/upload/ckfinder_temp/files/20210605021759.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/24252682031.pdfIn PDF document text
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/39678784130.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607c018c1e370---81154924204.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766378cbb6e---pemawokidugupopadatupuse.pdfIn PDF document text
    • http://glavis.biz/userfiles/file/fojelu.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609432f369f20---21849063483.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/denapusojoje.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/85788207983.pdfIn PDF document text
    • http://emaaravm.net/upload/files/todijaxebuta.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/de177bab9995606cd3e9446fece7d0bc/dimedexizimupisisitobusut.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/82486074389.pdfIn PDF document text
    • https://superpart.com/files/sipelodoli.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/wojiditifufi.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/vuwifisixizovigepi.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607716fd827b2---72659126968.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=robot+arm+project+pdfPDF 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_off0000f292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF292 10684 bytes
SHA-256: a2abb602c2fbf8f3feece3815abd37999b4c1fa824929aaf4fb3a1c71ebb81af
font_01_sfnt_off00010ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE8 17584 bytes
SHA-256: 6d8eb040c6f62c1562c2318cf4a2097260f523d56013055907e7cc87be3b5f2e
font_02_sfnt_off000138ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1