Malicious PDF — malware analysis report

Static analysis result for SHA-256 90d34bd7847eca66…

MALICIOUS

PDF

80.8 KB Created: 2021-09-23 18:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ec7369b795f8667bbd635f10fb83cc5b SHA-1: 46a00dd8f451d57b6e1f25cb2bd8e3eda680e0cb SHA-256: 90d34bd7847eca6636ec92289ed515eb4ecd84a627eaa6fae239c1c601b28ece
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript and numerous URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a tactic for distributing malicious content or phishing. The embedded JavaScript likely facilitates the redirection or further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://tallerescarrion.com/uploads/file/duwikataduvag.pdf In PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/d9665065aea3df411cecad8eca0db386/1789791089.pdfIn PDF document text
    • http://sapthagireesyathra.srikarpagavinayagamills.com/userfiles/file/40818363043.pdfIn PDF document text
    • https://kingbakerypans.com/userfiles/file/vabilosaz.pdfIn PDF document text
    • http://areaengineeringsrl.eu/userfiles/files/21064414307.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/16143808625.pdfIn PDF document text
    • https://noclegsosnowiec.pl/eurostyl/photos/file/31131124678.pdfIn PDF document text
    • http://unesco-mediain.cz/fckfiles/file/35638483440.pdfIn PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20210923_D8792DEC812246AB.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/161369ede246ca---93642857243.pdfIn PDF document text
    • http://konikanarrowfab.com/ckfinder/userfiles/files/zovidoxezelufenutolowu.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/76114112530.pdfIn PDF document text
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sekonegotitunilotofozefi.pdfIn PDF document text
    • http://charterfori.ir/basefile/charterforiir/files/63824660721.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141231417ea3---94456206902.pdfIn PDF document text
    • https://cqhuaan.myhost360.cn/upload/files/09-17-05-06-34-10.pdfIn PDF document text
    • http://www.llmhospital.com/www/js/ckfinder/userfiles/files/8336611947.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/25828394698.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/dusolakowo.pdfIn PDF document text
    • http://yameitecl.com/ckfinder/userfiles/files/20210903_071711.pdfIn PDF document text
    • http://twinmd.ru/userfiles/file/70283642796.pdfIn PDF document text
    • https://regionalhealthprogramsww.com/images/file/refuropul.pdfIn PDF document text
    • https://polymadeniyaglar.com/fckeditor/userfiles/file/loremapedabagodaluvo.pdfIn PDF document text
    • https://pchome.uzai.ca/upload/files/68461035675.pdfIn PDF document text
    • http://abwva.com/uploads/files/37663093023.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=promille+rechner+app+androidPDF 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_off0000d94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94C 17432 bytes
SHA-256: 130ebc06da7a8eb79d656ac0a9e3a7d1edf3358d3577b7fed3d54b68e2c26080
font_01_sfnt_off0001060f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E26 10512 bytes
SHA-256: 24f82c4806adf5debc0b091ba3d46fa9f4ab3b2365f29ef6135b9f52b932d157