Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb276964c7e7348…

MALICIOUS

PDF

65.1 KB Created: 2021-03-17 07:56:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a1eb6ff942a2b26238351abbead49d96 SHA-1: a66fcd5df6ae8a7c76b7e4a7a160536fa0a99ade SHA-256: ffb276964c7e73486300f45893a5832a779126c223c7da1496a2e500a997f4db
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a heuristic indicating a link farm, with numerous external PDF links. The primary URL and a secondary URL point to domains associated with distributing PDF files, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains keywords related to downloading model papers, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8273

Heuristics 3

  • 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.
  • 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://lozipotod.ru/award?keyword=ap+grama+sachivalayam+model+papers+pdf+download PDF link annotation
    • http://bavimobuxadu.medianewsonline.com/72438036181.pdfIn PDF document text
    • http://kebenoda.scienceontheweb.net/92680489611.pdfIn PDF document text
    • http://doordash.fun/niwamub2wstk.pdfIn PDF document text
    • http://help-bluebadgecenter.com/what_is_the_playstation_vita1tffi.pdfIn PDF document text
    • http://zalewef.iblogger.org/retinoblastoma_adalah.pdfIn PDF document text
    • http://sotipidikukunow.getenjoyment.net/jamanotedafod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wopari/pillars_of_eternity_class_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/gilixasoriwewifita.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/ruzujarugiber.pdfIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_fd811818dfdd4e1a920caa1c7bf6ecf2.pdf?index=trueIn PDF document text
    • http://buzurofomurab.rf.gd/the_doll_boleslaw_prus.pdfIn PDF document text
    • https://2987c0f4-171e-4473-b3f1-a5468658115b.filesusr.com/ugd/75ff8a_da918b76748342fc88f6dc2f207de868.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dotivaf/asus_m2n68-am_plus_audio_drivers_for_windows_7.pdfIn PDF document text
    • https://cdd249b8-77b1-4a94-b024-8995efe4d959.filesusr.com/ugd/d394ff_2d9d0089ec764078a6038bdc53cff1ef.pdf?index=trueIn PDF document text
    • http://tuwutexo.onlinewebshop.net/bhagwat_geeta_yatharoop_free_download.pdfIn PDF document text
    • http://pulitisagot.atwebpages.com/austria_student_visa_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/40512359611.pdfIn PDF document text
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_b745d68e5804410d9b1785864debb635.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/kidabizeduzor.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/what_does_galarian_mean.pdfIn PDF document text
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_065065eabfa148efbfb7019a3c18a696.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96E 5812 bytes
SHA-256: e7c4899b44084721baecd532f64177cab32248234b5fd4d2faa3e44c72caa129