Malicious PDF — malware analysis report

Static analysis result for SHA-256 4255ce73952a9ff8…

MALICIOUS

PDF

77.0 KB Created: 2021-03-21 00:56:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d7fc0d088dfe66e38bcce3a0b2dec95 SHA-1: 4f784983108461b2c3e902bbf96c1921d375ec6b SHA-256: 4255ce73952a9ff8c1a3f9e14c30ae4f6c48eaa60d602add14723d3d45547423
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which, 'https://zajinet.ru/strik?utm_term=gender+trouble+summary+chapter+1', is flagged as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of malicious URLs and the overall detection profile suggest a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/strik?utm_term=gender+trouble+summary+chapter+1
    • https://cdn.sqhk.co/lazujanaziri/bjbijki/58470812244.pdf
    • http://giwidesavezur.22web.org/naca_6_series_airfoil.pdf
    • https://cdn.sqhk.co/tamaladafa/ieqjiLG/planet_of_the_apes_2001_trailer.pdf
    • https://static.s123-cdn-static.com/uploads/4459028/normal_600152ff53c30.pdf
    • https://pidoruna.weebly.com/uploads/1/3/5/9/135966994/4b92afee52.pdf
    • https://tupalomixesitet.weebly.com/uploads/1/3/1/3/131379559/dulawejukovegewu.pdf
    • https://cdn-cms.f-static.net/uploads/4410194/normal_60201f3be19d2.pdf
    • https://cdn-cms.f-static.net/uploads/4495251/normal_600f63426598a.pdf
    • https://cdn-cms.f-static.net/uploads/4381964/normal_603445bf4351f.pdf
    • https://norotenivepele.weebly.com/uploads/1/3/4/0/134042349/5722499.pdf
    • https://static.s123-cdn-static.com/uploads/4498994/normal_6001ebd9a5401.pdf
    • https://static.s123-cdn-static.com/uploads/4490001/normal_5fe3ff550f994.pdf
    • http://zaxevef.getenjoyment.net/zupow.pdf
    • http://rotiwopofeze.mywebcommunity.org/gunoteto.pdf
    • https://jazawimap.weebly.com/uploads/1/3/5/3/135346256/vexodag.pdf
    • http://fidumanodabimor.22web.org/geometric_sequence_formula.pdf
    • https://vimavopama.weebly.com/uploads/1/3/4/7/134769365/pekalebiwagojinede.pdf
    • https://cdn.sqhk.co/zijigemeworu/jeDjif1/mad_dragon_defense_mod_apk_1._3._8.pdf
    • http://pavozuketogo.mygamesonline.org/55472928800.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jufabopijogik.rf.gd/workforce_diversity_case_study.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_off0000ee3e.bin
9692acc5f2d5e7ccda42f0f910d9c7efccc860c00320f2d78d340665bd753666
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3E 5640 bytes
font_01_sfnt_off00010143.bin
b9d5693555d74ccc3eb7e9b9cd7240fb31754e10f252bded3975ac0d5a682bf2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10143 10724 bytes