Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb3f4dc2279a2c64…

MALICIOUS

PDF

78.8 KB Created: 2021-03-18 21:30:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5eff99c48375fc047f1e0c0447737719 SHA-1: 80a19bc5d97e7b7a76cd57f27fb5d932865d0fe4 SHA-256: bb3f4dc2279a2c64f08e74ce36fcb9a4098c338df22d2dd06612d003695801b2
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to a 'Jeep liberty manual transmission review'. The primary malicious indicator is the external URI pointing to a suspicious domain, likely intended to host a phishing page or download further malware.

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://dafemum.ru/wix?keyword=jeep+liberty+manual+transmission+review
    • https://cdn-cms.f-static.net/uploads/4423696/normal_6046a32325f7f.pdf
    • http://zunuruxeguxifi.mygamesonline.org/xudesubuvupazagef.pdf
    • https://static.s123-cdn-static.com/uploads/4404723/normal_5ff8dc355fbaf.pdf
    • https://cdn.sqhk.co/bubiwalifeda/d1agXih/95717735369.pdf
    • https://cdn-cms.f-static.net/uploads/4490138/normal_604ce4e16ec86.pdf
    • https://static.s123-cdn-static.com/uploads/4448724/normal_5fff2e6ba138e.pdf
    • https://cdn.sqhk.co/rowemarul/jiSDidz/cheats_for_sims_4_xbox_one_star_wars.pdf
    • https://cdn-cms.f-static.net/uploads/4481062/normal_6023e1fd30cf7.pdf
    • https://static.s123-cdn-static.com/uploads/4451565/normal_5fe2e13b80852.pdf
    • https://cdn-cms.f-static.net/uploads/4490534/normal_5fe8662005827.pdf
    • https://cdn-cms.f-static.net/uploads/4457279/normal_5fd645168b314.pdf
    • https://static.s123-cdn-static.com/uploads/4528780/normal_5ff70a59d032e.pdf
    • http://latitekiwa.scienceontheweb.net/47409529492.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fa3f2985-242d-4a4c-93c0-6adbfb259eaf.filesusr.com/ugd/8dbe7a_051f097a1ea54ac68dcd0154276a235c.pdf?index=true
    • https://s3.amazonaws.com/vekodupiwarobi/amma_songs_free_telugu.pdf
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_0e6b855ddab0472c93de37f982cd5c06.pdf?index=true
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_3cfd1ea1135e47728aece96e2e622793.pdf?index=true
    • https://s3.amazonaws.com/fajixe/58624346009.pdf
    • https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_d09c2b0406c14290bad04eb26f174dd9.pdf?index=true
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_9cc9fa541b9f4d66a11a48edf18229f2.pdf?index=true
    • https://s3.amazonaws.com/gadumagabusodel/donors_choose_thank_you_letter_template.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_off0000f169.bin
3cb6d9debc65a934f63c031378ebcb5dc6542b31cdb259bec61b771aafa12e74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF169 5348 bytes
font_01_sfnt_off00010391.bin
151d68818d1ea2300157b3c946490c052c98cb14354de0c106bc4c9852d71dcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10391 11844 bytes

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