Malicious PDF — malware analysis report

Static analysis result for SHA-256 18aaabaf6e0e2b76…

MALICIOUS

PDF

68.2 KB Created: 2021-09-29 12:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6310c996f89582aacc8aabf4d494ed8a SHA-1: a918c762e3573c90938da8dfbbab2e2e4309e313 SHA-256: 18aaabaf6e0e2b761ad1d6e4a9f51bb081200b86813050154f6c45b9b4a4b5f4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and is identified as a phishing lure. The document's structure and content suggest it is designed to trick users into clicking on external links, likely for malicious purposes such as credential harvesting or malware distribution. The presence of numerous external URLs hosted on disposable domains further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://pistant.ru/uplcv?utm_term=dbz+attack+of+the+saiyans+rom PDF link annotation
    • http://lab4050.com/upload/editor/file/86508451809.pdfIn PDF document text
    • https://inprovitchile.com/ckfinder/userfiles/files/59213730576.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/vofopufed.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/53275030881.pdfIn PDF document text
    • http://sumbulefendiegitimvakfi.com/resimler/files/61211768015.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/kisipavakosapado.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/ximulonume.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/dewenej.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/48261843721.pdfIn PDF document text
    • http://jinsonmetal.com/Upload/file/32431381070.pdfIn PDF document text
    • http://spodne-pradlo-2bpoint.sk/UserFiles/File/wepefesamizezikavofawuwu.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/12640254563.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/63033656451.pdfIn PDF document text
    • https://satnamunicipalcorporation.com/admin/ckfinder/userfiles/files/66893761302.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/gipapugirenejumaxafomasad.pdfIn PDF document text
    • http://vecsecity.info/editor_up/47505489843.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144b03eea529---zofolafikapobiwa.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/33909963727.pdfIn PDF document text
    • http://bctlorraine.org/userfiles/file/76772587785.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/5219451148.pdfIn PDF document text
    • http://el-system.jp/uploads/2012/files/31104993783.pdfIn PDF document text
    • http://zanethompson.com/userfiles/file/gafolesavax.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/56296045044.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_off0000ad8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A0 14448 bytes
SHA-256: 02f7b87d139263c89cdee5929dea8ad1e1f66052787c9d93606e0ab7226f90bd
font_02_sfnt_off0000e9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DF 10960 bytes
SHA-256: eb360ec34c03077997065b1a943cea782aaba7540df5fe09173bf232a0808435