Malicious PDF — malware analysis report

Static analysis result for SHA-256 4638948a9b8ab450…

MALICIOUS

PDF

79.0 KB Created: 2021-03-14 20:29:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88e8cf357d4942d96a5acc5b886bb1bc SHA-1: 6ab70d7424ea9b14784494c4beb07ea955b0eb63 SHA-256: 4638948a9b8ab4502b031fc21247ec25b743c4cdbb5d366fa59af1b7e7d3cfd9
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to 'https://nipisod.ru/wix?keyword=no+man+is+an+island+meaning+john+donne', likely intended to redirect the user to a malicious site. The document body appears to be garbled, but the presence of the URI and the high confidence scores suggest a phishing attempt disguised as a search result.

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://nipisod.ru/wix?keyword=no+man+is+an+island+meaning+john+donne
    • https://cdn-cms.f-static.net/uploads/4379217/normal_600fd132b0b73.pdf
    • https://static.s123-cdn-static.com/uploads/4393632/normal_5ffe538731542.pdf
    • https://cdn-cms.f-static.net/uploads/4388279/normal_5fd61ad2c6393.pdf
    • https://cdn-cms.f-static.net/uploads/4482853/normal_603e331d398eb.pdf
    • https://cdn-cms.f-static.net/uploads/4495269/normal_6020cb4776387.pdf
    • https://cdn-cms.f-static.net/uploads/4446394/normal_5fd30a6034c32.pdf
    • https://cdn.sqhk.co/gutejalajige/gjhEI94/supplementary_math_meaning.pdf
    • http://fabifux.22web.org/63466691305.pdf
    • https://static.s123-cdn-static.com/uploads/4389601/normal_6007dea9b004c.pdf
    • https://cdn-cms.f-static.net/uploads/4488842/normal_603abcf0112c3.pdf
    • https://cdn.sqhk.co/jivonaxadu/hf4jhhX/89120532511.pdf
    • http://givevexuwode.iblogger.org/mijikalemudalokowesikaxe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://puzuzebud.epizy.com/wanadevovaw.pdf
    • http://madulok.epizy.com/alphabet_handwriting_sheets_ks1.pdf
    • http://xewowibaxe.rf.gd/kalibopuvepemaxariluv.pdf
    • https://s3.amazonaws.com/gosete/93500732557.pdf
    • http://pudofifomabevin.rf.gd/pevagepe.pdf
    • http://volarudene.epizy.com/ccna_study_guide_2020.pdf
    • https://s3.amazonaws.com/fezenur/fusanezuwotexowarajeg.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_off0000f8ab.bin
5fe5f29ef9b22d05a26422800fe650c0560edf43345ac13302867c87d680f105
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AB 5188 bytes
font_01_sfnt_off00010a2c.bin
a0dd2297b733d58281c243d65fa02bf4dbb19ba47da9dc60f2ca12eb0307ffeb
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2C 10168 bytes