Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a6baf078625a63d…

MALICIOUS

PDF

75.9 KB Created: 2021-03-28 02:41:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 279acfa516c1e5a2c89f295907b90617 SHA-1: 76dd9cb106d05a1071517e3f2a0a6ac516057eaa SHA-256: 4a6baf078625a63d93d3725b91075bcd165404f2dd659a645c463907feb0d5c5
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. Heuristics indicate the presence of external URIs and a ML classifier flagged it as malicious. ClamAV also detected it as a phishing trojan. The document body, though heavily obfuscated, appears to reference 'Garmin g600 txi pilot's guide', suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=garmin+g600+txi+pilot%2527s+guide
    • https://cdn.sqhk.co/lowanivari/giifi1Y/sumaligagaburi.pdf
    • http://fakosujonipej.iblogger.org/duxixoxubutat.pdf
    • https://cdn.sqhk.co/kowaziwaso/Xuchihj/11296403440.pdf
    • https://cdn.sqhk.co/lewoxiguj/iU72Ioc/market_absorption_rate_calculator.pdf
    • http://nosesakegipol.iblogger.org/faxokageg.pdf
    • https://cdn.sqhk.co/dutimapo/rhbj9jf/ion_science_titan_manual.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://40c507a3-37b7-491f-afd3-f28ba3af1fb2.filesusr.com/ugd/7f5264_4023f27bd3ac48169af3e2eed916e112.pdf?index=true
    • http://gabepan.epizy.com/saxam.pdf
    • https://s3.amazonaws.com/kewakuko/49656044806.pdf
    • http://vevidukasi.epizy.com/verifudas.pdf
    • https://s3.amazonaws.com/sukedil/let_her_go_sheet_music_piano_free.pdf
    • https://s3.amazonaws.com/dugibabafod/articuno_shiny_form.pdf
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_f0dad721730b4a298ad68b774b82d13e.pdf?index=true
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_99f4e2606efa44499034173186b23236.pdf?index=true
    • https://3568ea06-17fa-4787-91ae-86b9aa918cbd.filesusr.com/ugd/8ade13_23c21364f2bf4aeb8cc7119976242304.pdf?index=true
    • http://petegamab.epizy.com/goxaxunezak.pdf
    • http://gonumarimemax.epizy.com/chrome_android_apps_windows.pdf
    • http://tuvufuxo.epizy.com/53755283260.pdf
    • http://fivasire.rf.gd/bursary_application_form_2020.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_off0000e795.bin
47829a518ec44dee369dd3bb99d040c432b2ab69852b785683101ed44b079fb2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE795 5708 bytes
font_01_sfnt_off0000faf3.bin
eb7eb14ddb740360d6f1fd97c0489c21b9caf0fcaef6cd9c6bda9e12829e8c74
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF3 11156 bytes