Malicious PDF — malware analysis report

Static analysis result for SHA-256 e54db5e53f241dee…

MALICIOUS

PDF

77.4 KB Created: 2021-03-23 22:41:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5732399a1e552c931554ca0356b65716 SHA-1: 1a0a45131631c51f7ea9a028eb582fb47b099033 SHA-256: e54db5e53f241dee8631f60d6c87cf92fb54a826463815fd6664e18878e0f61a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to 'https://lozipotod.ru/wix?keyword=play+doh+peppa+pig+ice+cream', suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/wix?keyword=play+doh+peppa+pig+ice+cream
    • https://cdn-cms.f-static.net/uploads/4453142/normal_604f9ceac2b91.pdf
    • https://cdn-cms.f-static.net/uploads/4373016/normal_602942b6e4f68.pdf
    • https://tuxinotem.weebly.com/uploads/1/3/4/8/134883911/d02c7e18c.pdf
    • http://wodekenizowa.getenjoyment.net/funarim.pdf
    • https://navanelesud.weebly.com/uploads/1/3/0/9/130969746/kigalerodaturi.pdf
    • http://wumomotetidofe.getenjoyment.net/aspects_of_verbs.pdf
    • https://xalekosud.weebly.com/uploads/1/3/5/3/135350534/c24d804a20f77.pdf
    • https://suzazenesegi.weebly.com/uploads/1/3/0/7/130776168/7506106.pdf
    • http://xawegap.mywebcommunity.org/how_to_find_joint_cdf_from_joint.pdf
    • https://static.s123-cdn-static.com/uploads/4366035/normal_60062f43a3a55.pdf
    • https://cdn-cms.f-static.net/uploads/4451217/normal_6011f37e15a50.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/veledabejufi/interactions_in_ecosystems_webquest_answer_key.pdf
    • https://s3.amazonaws.com/dowesitobuga/what_is_present_perfect_tense_with_examples_ks2.pdf
    • https://s3.amazonaws.com/jebokizez/chocolate_sheet_cake_recipe_without_buttermilk.pdf
    • https://s3.amazonaws.com/vutame/rujiwakenipurug.pdf
    • https://s3.amazonaws.com/pusolefosex/sebuwa.pdf
    • http://vigavanoxe.onlinewebshop.net/renutijokosajofufelire.pdf
    • https://s3.amazonaws.com/bubeto/where_to_donate_good_mens_clothing.pdf
    • https://s3.amazonaws.com/lunojol/antares_autotune_evo_vst_v6._0._9.pdf
    • https://s3.amazonaws.com/bupaxomu/download_turbo_c_software_for_pc.pdf
    • https://s3.amazonaws.com/xezonijida/career_launcher_csat_test_series_2019.pdf
    • https://s3.amazonaws.com/vuforewebub/princess_diaries_books_reading_level.pdf
    • https://s3.amazonaws.com/memexelu/vuwife.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f198.bin
1b3e08a89870833cec0e26c0e00a9b57bedfe021c1951e5fe9a2e8d9ca499691		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF198 5412 bytes
font_01_sfnt_off000103e4.bin
e0b44e7dc2ab35a7063a03b25a5e611a42694e6b025fdfccf9fd9af944328e37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103E4 10232 bytes

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