Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb0d2217f45338e9…

MALICIOUS

PDF

88.0 KB Created: 2021-09-08 13:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d5babfa2aa822617a8f79c76b2a05ae3 SHA-1: bb353815368ebdbdb35967fddcfb2430dcec9419 SHA-256: bb0d2217f45338e9c061646d876eb7dbd10ada66d068e53b0dbb545ce80289a1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a link farm, with numerous external URLs pointing to PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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 http://technoauto.jp/js/upload/files/62366356643.pdf In PDF document text
    • http://klm-co.ru/foto/ck/files/sevawuzupo.pdfIn PDF document text
    • http://labuchedeberce.fr/userfiles/file/92473642136.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/8383542119.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/biviwagoladobatadofavopo.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/76304599920.pdfIn PDF document text
    • http://julianina.de/upload/file/91153558312.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/gevane.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/jikifito.pdfIn PDF document text
    • http://kingkady.cn/uploadfile/files/bakagapisujix.pdfIn PDF document text
    • https://fpcofmacon.com/nbloom/fckuploads/file/tinugozekotosewetubaxirez.pdfIn PDF document text
    • https://ruta.hu/ckfinder/userfiles/files/83854483619.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/53779339124.pdfIn PDF document text
    • https://tempatpasang.com/contents/files/64714826559.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/47637575933.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613251ab13d59---tafobonega.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/54100149604.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/ribologavikuwut.pdfIn PDF document text
    • http://chipgene.com/image/files/20210903_081004.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/2861778031.pdfIn PDF document text
    • http://greathorserider.com/ckfinder/userfiles/files/37391094312.pdfIn PDF document text
    • http://lachambredechos.com/userfiles/file/naxefumapise.pdfIn PDF document text
    • https://majubesar.com/contents/files/22330201888.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=free+double+digit+addition+and+subtraction+worksheets+with+regroupingPDF 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_off0000f01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10833 11188 bytes
SHA-256: 2e3cf9ba112454c4fc5057b8b00089375535367ef22b41fa01f832cf7b9bfb35
font_02_sfnt_off000121ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121ED 18520 bytes
SHA-256: e25c8038861565953c49cf6861e4dae559d694c112109e5c63cd37b026d336f1

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