Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b3760d759a698f8…

MALICIOUS

PDF

79.4 KB Created: 2021-07-16 17:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: de1008531f7740c47bd8ce64be821529 SHA-1: 225518a5e11d5f8c17135e0094122f4538689b2e SHA-256: 2b3760d759a698f8444b0357d5045e3ad83517afd59246d53f667f88a36face2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. The document contains numerous links, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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 http://mindentudor.hu/userfiles/file/57111370545.pdf In PDF document text
    • http://provia-events.de/pics/fotos/1/file/1711829011.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/578560927018f395d05f65cf5dcf37f0/zofovepudesa.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/xevuwabuxiwodebu.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4c85dcaa1---xuxotavekuxu.pdfIn PDF document text
    • http://ridendo.cz/files/file/15063355790.pdfIn PDF document text
    • http://congluc.com/upload/files/nubosizanasadekilanezexiw.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4bd7b3c1e3---derupezepebomoda.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/7f3fb03b2e7b936e26e4f6a0bb78f183/buketuvaponafubax.pdfIn PDF document text
    • http://lbtech.kr/upfile/files/nanezetatokexabo.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/48392967705.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/73676718603.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/4o7simb19t66g3vhtsciki52u1/tadimasilakake.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/2rb2td15uv6940j9vpv04d645f/jasemiwimevup.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/54310476504.pdfIn PDF document text
    • http://donghocasiochinhhang.net/uploads/userfiles/file/vejudedoj.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/vunigumojipalosenawekoj.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/mutajozegesowinolugijon.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1607eea63c0fb4---nuvenemufaderasojofuza.pdfIn PDF document text
    • http://asustainable.com/global/file/53119905190.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c99547cfcc---59373662479.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/71539047402.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cb9f9175c---molumoxa.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/40663817522.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/megusumis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=untainted+meaning+in+englishPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46E 10484 bytes
SHA-256: 03054321f6fca0c7cdf39c9d7943507bff5ad318b9370363695d24c10c821bf1
font_02_sfnt_off0000ebc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC4 17160 bytes
SHA-256: 6309e5844f78c39b7c5cf369d63364573a9a31ea90704b5f6cbf6766563874a5
font_03_sfnt_off000104d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D0 16532 bytes
SHA-256: c90b71fe7245947840dbeb5fce77c106698212bf7ae379fe3188516067b4c1f6

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