Malicious PDF — malware analysis report

Static analysis result for SHA-256 c67e583678927e45…

MALICIOUS

PDF

65.1 KB Created: 2021-09-15 18:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a7d6a5341a520c0e5c0b72f69c04ab13 SHA-1: ba504f9cc7f1e574af583064e2a9b603a92e38a0 SHA-256: c67e583678927e450a40198b3f43adfe171067a07a9ddd6ca6eef4551bda5b2d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5370

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://infrive.ru/uplcv?utm_term=badminton+blitz+ios PDF link annotation
    • http://aviatechinform.ru/sadm_files/45807477447.pdfIn PDF document text
    • http://goldsunjsc.com/upload/files/16840295957.pdfIn PDF document text
    • http://bftt.marketsearching.com/upload/files/zoxope.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/fewigekesod.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/12654736544.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/46964481895.pdfIn PDF document text
    • http://strandedtattoo.info/file/22340716301.pdfIn PDF document text
    • http://cristalensi.com/public/File/51711267773.pdfIn PDF document text
    • https://xtrafitcoaching.com/www/images/files/33682189779.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/wegokusaridojemazemuf.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/jolizelevimiroziwod.pdfIn PDF document text
    • http://shijijiaming.cn/filespath/files/20210909150920.pdfIn PDF document text
    • http://www.dgtrans.co.th/login/ckfinder/userfiles/files/84350488149.pdfIn PDF document text
    • http://air-con.ru/upload/files/gamekoxu.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed6e78d3c0---60042458114.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/puwijojewadejepapo.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613919f7ba03e---41560076489.pdfIn PDF document text
    • http://hexindechem.com/upload/files/50034378855.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/nufebisogarono.pdfIn PDF document text
    • https://adminico.nl/userfiles/file/99136229253.pdfIn PDF document text
    • http://phongkhamthienhoa.vn/images/files/48562684129.pdfIn PDF document text
    • http://puisan.ru/uploads/file/43044798511.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/85036778910.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/82538989480.pdfIn PDF document text
    • http://okna-stv.ru/userfiles/files/75010891813.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/nisejut.pdfIn PDF document text
    • http://doudou.tw/userfiles/files/59719202012.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/61480426592.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF41 10432 bytes
SHA-256: b60ba7e9d338a16200224a50d060abcab77567eb2d3ba8ea0db5d8db89515919