Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab462d096ae0e0d4…

MALICIOUS

PDF

71.6 KB Created: 2021-01-19 03:46:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2ce43de8b40994d3e0274120c5d4f2ea SHA-1: b3dc13839b3031d867bab190acaea2e3ab0225db SHA-256: ab462d096ae0e0d434c77ddf719525f5a851f720116d59dcd2c27c059361af76
66 Risk Score

Malware Insights

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

The ML classifier strongly indicated maliciousness, and the PDF contains numerous external URIs, with one specifically identified as a link farm on disposable hosting. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. The presence of embedded URLs and the link farm heuristic suggest the primary goal is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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 https://leonvi.ru/aws?utm_term=smack+that+remix PDF link annotation
    • https://site-1178749.mozfiles.com/files/1178749/64927535039.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469827/normal_5ff667a4b80c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492275/normal_5fc18573d7e19.pdfIn PDF document text
    • https://site-1178035.mozfiles.com/files/1178035/best_online_soccer_store_usa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443594/normal_5fabc516dec4d.pdfIn PDF document text
    • https://site-1176410.mozfiles.com/files/1176410/ambient_weather_station_home_assistant.pdfIn PDF document text
    • https://site-1172169.mozfiles.com/files/1172169/jopexobi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493245/normal_5fe3e787ed4ec.pdfIn PDF document text
    • https://site-1180799.mozfiles.com/files/1180799/bhojpuri_movie_new_2018_full_hd.pdfIn PDF document text
    • https://xopezafetuwov.weebly.com/uploads/1/3/5/3/135314897/6678577.pdfIn PDF document text
    • https://dawofatodir.weebly.com/uploads/1/3/4/7/134756430/1221276.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488317/normal_5fd30de54809f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zodawanuror/wonepidogutofatawex.pdfIn PDF document text
    • http://vajexakatozezal.epizy.com/zarinajib.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/pupexoxumawujokilojukiwun.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/bombay_velvet_full_movie_coolmoviez.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DC 4636 bytes
SHA-256: a19af9a85e23b0782a89c000d9069c77e736c8e5324c83dcead8e88759f93eaf
font_01_sfnt_off0000e08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08E 10368 bytes
SHA-256: f566b7a00c9efbf7c6266eb512883926027304252219335e34820eae73dd0be8
font_02_sfnt_off000103d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.