Malicious PDF — malware analysis report

Static analysis result for SHA-256 e463be203cb92996…

MALICIOUS

PDF

76.3 KB Created: 2021-03-12 08:53:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ede47b7a3ad09fd56a836f4ad6b046a SHA-1: 7f8e9b79dfd51b5736d77f547962bc7fd295c3b5 SHA-256: e463be203cb92996e53da07321f2ba6b4845b6daedb0003ef71f50fff8119851
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, characteristic of a link farm or SEO spamming operation, with many pointing to other PDF files. The primary purpose appears to be directing users to potentially harmful or misleading content hosted on external domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8506

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/award?keyword=electrolysis+of+brine+pdf
    • https://cdn-cms.f-static.net/uploads/4456114/normal_6048e96dbef6d.pdf
    • http://tojumuwuluso.iblogger.org/caballo_de_troya_1_jerusaln_1984.pdf
    • https://static.s123-cdn-static.com/uploads/4386852/normal_5fe0613ae52e7.pdf
    • https://sesuxaned.weebly.com/uploads/1/3/5/3/135349378/1349836.pdf
    • https://cdn.sqhk.co/kewawukufiju/0Jjghwy/29657907079.pdf
    • https://cdn-cms.f-static.net/uploads/4454813/normal_603d12213c5ea.pdf
    • https://cdn.sqhk.co/vetelojid/jijhzhj/wordscapes_level_8521.pdf
    • https://cdn-cms.f-static.net/uploads/4366389/normal_6025fcb8b9336.pdf
    • https://cdn-cms.f-static.net/uploads/4495265/normal_6040b34d6df7e.pdf
    • https://luxaxila.weebly.com/uploads/1/3/0/8/130814132/lagawuz.pdf
    • https://cdn-cms.f-static.net/uploads/4486535/normal_60126a2953402.pdf
    • https://fexiragija.weebly.com/uploads/1/3/1/4/131409693/besoda_xunuda_badazopimewakok.pdf
    • https://cdn-cms.f-static.net/uploads/4490934/normal_6036da3b59e03.pdf
    • https://cdn.sqhk.co/bibilofefi/ozhblSC/42938744563.pdf
    • https://cdn.sqhk.co/tivanosox/hqijjbV/regal_theater_crystal_lake_movie_times.pdf
    • https://static.s123-cdn-static.com/uploads/4368235/normal_5ff4a96a815c3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/26cefe97-f282-4564-aeb5-6c944fb8063a/19997890548.pdf
    • http://wojegopuda.rf.gd/bugiduwid.pdf
    • https://uploads.strikinglycdn.com/files/cc4f6f19-e76e-4ab8-aeff-9b96f4d8a94d/business_vocabulary_in_use_advanced_book.pdf
    • https://uploads.strikinglycdn.com/files/1a03afff-dc6a-45fe-a1ab-08776a07c812/81407465820.pdf
    • http://nixuverojezuluz.epizy.com/66662009987.pdf
    • http://kikujebi.epizy.com/rewuna.pdf
    • https://uploads.strikinglycdn.com/files/9baf0d23-f396-4334-8e8c-46d0911976d5/tebewobogusizuzubovube.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f407.bin
603cce52a8fe955368a83b9a728760f051758804b34bcc70e7838981a2a10ae6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF407 4924 bytes
font_01_sfnt_off000104cc.bin
a73764ecbb5cc7b9e383e4472830d8e490b7f95b78341421ca08d332364075c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x104CC 10232 bytes
font_02_sfnt_off0001278a.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x1278A 4324 bytes