Malicious PDF — malware analysis report

Static analysis result for SHA-256 d561ef82049e6c8a…

MALICIOUS

PDF

73.2 KB Created: 2021-02-24 22:41:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 58344ad660932899b74758d4da6a2660 SHA-1: b0f57a049607b4b354dabb9a24d40eac9a9662da SHA-256: d561ef82049e6c8a5c8aff0ccf952fe15e26119ef92e4adf0c2ecdf29f6c77d6
126 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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/wix?keyword=realm+defense+cheats+ios PDF link annotation
    • http://xijulefabogi.getenjoyment.net/murray_6.5_hp_lawn_mower_spark_plug.pdfIn PDF document text
    • http://nobirejajatit.iblogger.org/45154960394.pdfIn PDF document text
    • http://brumbum6.xyz/what_is_the_overall_theme_of_tempestlxout.pdfIn PDF document text
    • http://vijufik.iblogger.org/tamil_movies_list_of_websites.pdfIn PDF document text
    • http://autokenn.com/85309944072mueiv.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/how_to_put_graco_stroller_back_together.pdfIn PDF document text
    • https://cdn.sqhk.co/xevezele/aTpigy3/light_presets_download.pdfIn PDF document text
    • http://kadabafomelu.66ghz.com/lirunukumevasipax.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/fuzjdjg/jonenavowufomit.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/platicas_prebautismales_cuauhtemoc_chihuahua.pdfIn PDF document text
    • http://zufufamaz.66ghz.com/letapobijakovazazu.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/how_long_does_it_take_for_an_atomic_clock_to_set.pdfIn PDF document text
    • http://bukosasamekow.22web.org/george_foreman_grill_cook_times_and_temperatures.pdfIn PDF document text
    • https://cdn.sqhk.co/wugeguxu/KicbAhi/supujepogojus.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/62826767448.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuwutitaw/axLPUXS/29699473209.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaxufaxurawago.epizy.com/64067976505.pdfIn PDF document text
    • http://vavilonogamet.epizy.com/custard_apple_leaf_information.pdfIn PDF document text
    • http://dovanokeji.epizy.com/tukasisi.pdfIn PDF document text
    • http://xaxibalese.epizy.com/powarudobevapuva.pdfIn PDF document text
    • http://ketufazez.rf.gd/29692878762.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_off0000d584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD584 3488 bytes
SHA-256: 0f602b020dc6dd63dc04ecd53ded7895b4598fad879ad71162346df75fc4e60e
font_01_sfnt_off0000e20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20D 5172 bytes
SHA-256: 11225edb835bc08f81aa7bf9298117f8153802e310378dd61d3e08ea80d65622
font_02_sfnt_off0000f38b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38B 10472 bytes
SHA-256: d01fc2c3bb31d8962c639cf01bb9d5d919a2810bc056ca56acb44e486b748778

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