Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da698e3790397a1…

MALICIOUS

PDF

82.0 KB Created: 2021-05-12 10:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52cb7610d6aec710fb8186201d44ed64 SHA-1: 27e67b1650ac9e04c48d41325e8b9334199ada3b SHA-256: 2da698e3790397a14dc213ee17a8bdf7bdae6ba488699c8e493da8c6b523ac7a
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, which can be abused to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://botokaw.ru/strik?utm_term=what+is+the+ending+of+into+the+wild
    • https://cdn-cms.f-static.net/uploads/4421959/normal_6060b5bd29758.pdf
    • https://cdn-cms.f-static.net/uploads/4417669/normal_6014e3a2424b3.pdf
    • http://nizavevorupuj.mywebcommunity.org/86434231647.pdf
    • https://static.s123-cdn-static.com/uploads/4422386/normal_5fcf7ceb5cec8.pdf
    • https://cdn-cms.f-static.net/uploads/4469852/normal_605247d0903cb.pdf
    • http://rarubife.mygamesonline.org/what_is_mechanical_shaker_used_for.pdf
    • http://bukenisefino.mygamesonline.org/atlas_d_arboriculture_fruitire.pdf
    • http://copytoshka.ru/dnd_5e_subclasses_warlockiu280.pdf
    • https://nokesopupikes.weebly.com/uploads/1/3/4/7/134767934/tidegafopexareket.pdf
    • https://static.s123-cdn-static.com/uploads/4404739/normal_5fe4f0db0ebc6.pdf
    • http://legendnat.space/gowinevesovovolorupljv3i.pdf
    • http://irisca.online/company_of_heroes_2_cheat_commands_mod_iius6b6.pdf
    • http://catsism.com/flight_radar_24_pro_apk_full_2019xit3d.pdf
    • http://urro-hu.com/23472372591bejg2.pdf
    • https://wumaluruporemad.weebly.com/uploads/1/3/0/9/130969386/dukil.pdf
    • https://cdn-cms.f-static.net/uploads/4501233/normal_600b524c1d74d.pdf
    • https://static.s123-cdn-static.com/uploads/4455380/normal_5fec00efc966b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c30b87d5-e38e-4f4c-8f61-e356d9eaafe8.filesusr.com/ugd/347120_80341e80f89348bb8c9bd84cee9869bc.pdf?index=true
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_8efc1ecba41b40ec9498e23699e42499.pdf?index=true
    • https://c5b3e1fc-3b55-407d-a8d9-2bfa6c9015c1.filesusr.com/ugd/6df244_b7b664a2ad404ab6b9d90f2a9db3ffa8.pdf?index=true
    • https://e05bdd54-7536-4db1-b7ed-110d7b12163e.filesusr.com/ugd/dd5a80_416352a043364adf9a97e347696c7db2.pdf?index=true
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_d249311b31194963b109cb55157b1d1a.pdf?index=true
    • 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_off00010365.bin
75a3c2ca762fb372cbc9d2a5ea0bd9fff576c14dd558e6832340bcd01b8e8cb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10365 5180 bytes
font_01_sfnt_off0001151f.bin
6973485bf06a685cb9b6a0811ba838fcfc43aa0680f806ca8acc9352ba83d6e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1151F 11052 bytes

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