Malicious PDF — malware analysis report

Static analysis result for SHA-256 012270235936260f…

MALICIOUS

PDF

72.1 KB Created: 2021-09-28 14:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: d59ae6bd88cf4783e358d15989c12398 SHA-1: e257b818e5677fae0bc57be224776f3bb532cef7 SHA-256: 012270235936260f0b1bbacfc05647a8de5207673e9ac2ff2d9367fe3576431e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with multiple heuristics indicating it functions as a link farm. The embedded URLs point to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://drafthe.ru/uplcv?utm_term=support+api+3+android PDF link annotation
    • http://westfallassociates.com/documents/file/vapomedosisebikitasi.pdfIn PDF document text
    • http://sdes.in/uploads/dobewi.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/p4v8p7acruiuu4idethbha4mgp/73997448069.pdfIn PDF document text
    • https://www.libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/funeravinilit.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/zuxedewonujejosekali.pdfIn PDF document text
    • http://agro-norwa.pl/userfiles/file/guwosabidajigat.pdfIn PDF document text
    • https://herfection.herfection.tw/upload/ckfinder_temp/files/20210925152615.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/kopiwup.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/75644411104.pdfIn PDF document text
    • https://shiksha24.com/userfiles/files/medew.pdfIn PDF document text
    • http://meghdoothsuzuki.com/uploads/61750800279.pdfIn PDF document text
    • http://hamzalegalservices.com/userfiles/file/53151963779.pdfIn PDF document text
    • http://hnfhdc.com/UpLoadFile/2021091709085841935.pdfIn PDF document text
    • https://sledovani2.gpshlidac.cz/www/userfiles/files/zurivep.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/kibegixuvonifaro.pdfIn PDF document text
    • https://wolfgang-photography.com/userfiles/files/nopupuvovelamiriwom.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/satuki.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/9022653eb6c0de06707c4962a918b384/kaxolu.pdfIn PDF document text
    • http://a-pro-peau.fr/userfiles/file/836864426.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/56771997031.pdfIn PDF document text
    • http://asesoriazabalburu.org/azaba/files/file/40118595540.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/cb38a11585d8ca036a935c36e01c3318/56400513418.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/8230614267.pdfIn PDF document text
    • https://wmu24.ru/media/file/dugupemilatusubitogas.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/sagubowibin.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_off0000b3c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C6 17480 bytes
SHA-256: b8d8b03c8f4b069eea46501b2d51c00aebc9e6224ad13f4af8a2976966b10ff2
font_01_sfnt_off0000e12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12F 10384 bytes
SHA-256: af66f652a55292b59bb901fdfbec4b6e45e7b2a33ca828c1bd04e21f6fdc2a42
font_02_sfnt_off0000f8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1