Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d09f52f9fab2ea4…

MALICIOUS

PDF

79.8 KB Created: 2021-03-18 12:38:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37dfd1aec547c674df3900e938d2ddd3 SHA-1: 2750c215cdf59e55736c84ac518bd540fbda1a11 SHA-256: 7d09f52f9fab2ea49ee69a3f6805a32004ed7880120968bf0d1ff6fd565ee998
136 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document instructs the user to open a password-protected archive, a common tactic to bypass gateway security. The embedded URL 'https://jacksth.ru/wix?keyword=casio+aqw-100+user+manual' likely serves as a lure or a redirect to the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jacksth.ru/wix?keyword=casio+aqw-100+user+manual
    • https://cdn-cms.f-static.net/uploads/4385014/normal_5fe6528e5c379.pdf
    • http://zimezobot.getenjoyment.net/how_does_a_coordinate_covalent_bond_work.pdf
    • http://mishabelle.ru/migoxupajevodosojonifbjlpe.pdf
    • http://likelid.xyz/letter_l_activities_worksheetsfz9ao.pdf
    • https://tatedugede.weebly.com/uploads/1/3/4/3/134311852/e35dc9d0.pdf
    • http://get3creditscores.info/guided_reading_resources_ks2hooyq.pdf
    • http://matroskin.space/rasuwadi1g3n2.pdf
    • http://filemarker.store/wopazatuvazotewuposhg85j.pdf
    • http://tujemet.scienceontheweb.net/61747005336.pdf
    • https://cdn-cms.f-static.net/uploads/4377662/normal_602d340a73af9.pdf
    • https://jajibesuwazigix.weebly.com/uploads/1/3/1/3/131383486/gusel.pdf
    • https://cdn-cms.f-static.net/uploads/4393751/normal_60525fcc20bb0.pdf
    • http://sallely.xyz/navewaretatasotabavofag3kk3.pdf
    • http://marinarus.space/218518554477z6qc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a8fdb364-3865-4521-a36b-e12f4de7752f.filesusr.com/ugd/e20637_3bb149895a2d49a9b7c0ab1a20126f61.pdf?index=true
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_e00089233417404d870d972f82c40960.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_off0000fa0d.bin
10bccecd01af5816bc908c05a7ae73a5978fbe7e2c5046319047b047f0e42a2d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0D 5180 bytes
font_01_sfnt_off00010bad.bin
d8de0cf9ee7683633e6f0f7225700ed073f68873541556422d2b998a252278ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAD 10976 bytes