Malicious PDF — malware analysis report

Static analysis result for SHA-256 6897b31780dc2bad…

MALICIOUS

PDF

80.9 KB Created: 2021-09-20 01:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 23ed95c9f7c6b12aff55837078c596be SHA-1: 125617f01f6098818c00d6fe5d7aa4f077b43c3e SHA-256: 6897b31780dc2bad3d2885cee7947324f5b639f5387c1c20799ad89a05bc5c77
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms indicates the PDF is likely used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://areopag-group.ru/sites/default/files/uploads/42984458661.pdf In PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210919_7647E6C8C6F2151F.pdfIn PDF document text
    • https://gift2goa.com/ckfinder/userfiles/files/94718580985.pdfIn PDF document text
    • https://drticket.ir/basefile/drtiketcom/files/lojimalokakudivadaseli.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd7a397664---55745143022.pdfIn PDF document text
    • http://noithatachau.vn/webroot/img/files/gotovanaxejaxox.pdfIn PDF document text
    • http://orzo.cz/uploaded/files/44269921500.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/17647225587.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/1809926738.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/95435429748.pdfIn PDF document text
    • http://sonarkella.com/userfiles/file/56853482616.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/vejevelumudodepigeferadi.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/54935756776.pdfIn PDF document text
    • https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/23869443503.pdfIn PDF document text
    • https://h16hr15k-h19hr37urn.com/contents/files/92973362270.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/a0c3dfd0d44e13c8f191190ec7831095/90114315932.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/40e8e0b5785917a0986ac48b1ab1c023/58256888230.pdfIn PDF document text
    • https://alpinebadmintonacademy.com/ckfinder/userfiles/files/joliga.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/fegotanofukomibetad.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/rikugub.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/70334447331.pdfIn PDF document text
    • http://kraemer-duennebacke.de/files/file/18207114251.pdfIn PDF document text
    • https://artcorner-fiberglass.com/userfiles/files/80197799906.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=fake+instagram+likes+appPDF 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_off0000d886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD886 10544 bytes
SHA-256: 308a38f7acc217a395d92d55dcab03d687e21b5d7cb82d2c14bc1aca6b1e7a3a
font_01_sfnt_off0000f083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF083 17872 bytes
SHA-256: 97a81f4c5a2fcc36aa5328be5086b321b0e28e623d76df5f29da6d852b15baaa
font_02_sfnt_off00011df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1