Malicious PDF — malware analysis report

Static analysis result for SHA-256 0684746d83e0caeb…

MALICIOUS

PDF

77.0 KB Created: 2021-03-16 01:36:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 92d5f81f43f5d9f26f22cb50a710e0f9 SHA-1: 8f9a503e6aec13ce877dee086ad606833f90c6d8 SHA-256: 0684746d83e0caebe962ab5276fb4820bfdbc1dbf3be8fb6e89df3237d88347e
64 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9805

Heuristics 3

  • 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://midufefew.ru/strik?utm_term=system+of+inequalities+graphing+worksheet+pdf PDF link annotation
    • http://wamuvosuvebupa.iblogger.org/94202039223.pdfIn PDF document text
    • http://sedouche.xyz/top_100_swiss_startups_2020c4jx9.pdfIn PDF document text
    • http://misitaka.iblogger.org/juzuruxowew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427105/normal_604cdedb43b86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5fd924a0d247a.pdfIn PDF document text
    • http://morpeoplelife.ru/xezenitusumamegujagc8xl.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/fluke_77_multimeter_input_impedance.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455642/normal_604fe6a95032c.pdfIn PDF document text
    • https://xewulatejema.weebly.com/uploads/1/3/5/3/135345986/mowawevixupakikipux.pdfIn PDF document text
    • http://sumazubaviloxog.22web.org/zuzosanelugagudemolovujon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451949/normal_5fc7a839c9a1d.pdfIn PDF document text
    • http://tometifo.getenjoyment.net/human_geography_meaning_in_hindi.pdfIn PDF document text
    • https://buritozube.weebly.com/uploads/1/3/0/7/130775753/9742046.pdfIn PDF document text
    • http://wirobigi.medianewsonline.com/40999588181.pdfIn PDF document text
    • https://tujobofawoti.weebly.com/uploads/1/3/2/6/132695409/1650949.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/pafov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_89c142bc10ad426e9a47f9877b4ea64d.pdf?index=trueIn PDF document text
    • http://pokatutabojew.rf.gd/66916438376.pdfIn PDF document text
    • https://69868269-04aa-4a0d-8379-1371762fd556.filesusr.com/ugd/d8beff_39c3a1a23b544a92a6b330afda4806be.pdf?index=trueIn PDF document text
    • http://nipuwiwabo.rf.gd/barcode_generator_tool.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB6 5944 bytes
SHA-256: 782e7ccae5f64710c63ebac76a25a45b498045e33ff5316146917ea6afa79bba
font_01_sfnt_off00010fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD5 12276 bytes
SHA-256: c0519d0524013380b1142d80d5118298b6fe57ec30bcf2c2523dc153e841774b