Malicious PDF — malware analysis report

Static analysis result for SHA-256 883cc3ce8b92c46b…

MALICIOUS

PDF

76.4 KB Created: 2021-05-15 22:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 452a48f7451cc0a439001a458dc77fb9 SHA-1: d76b2cfbaffafbf29249199d1c07de359133499d SHA-256: 883cc3ce8b92c46ba3db33e35664ac20d9ca7b087fdb9fc658a661f3ca3fdbf6
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search engine result, aiming to trick the user into visiting a malicious site. ClamAV and ML classifiers strongly indicate maliciousness, classifying it as a phishing trojan. No scripts were extracted, but the presence of an external URI and the overall detection suggest a phishing or credential harvesting attempt.

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://seumenha.ru/strik?utm_term=what+does+a+water+treatment+engineer+do
    • https://cdn.sqhk.co/xesozugis/kifv8eX/63517816984.pdf
    • https://cdn.sqhk.co/riragimi/mQdV18G/famefedif.pdf
    • https://xozavefo.weebly.com/uploads/1/3/4/0/134018900/d09f9837.pdf
    • https://daxatuvumuna.weebly.com/uploads/1/3/4/8/134863787/3804310.pdf
    • https://gozenanojive.weebly.com/uploads/1/3/4/7/134747079/168367c69c0efe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/najipavez/rainbow_vacuum_e_series_motor_brushes.pdf
    • http://niruvizuzeta.epizy.com/39141717423.pdf
    • https://uploads.strikinglycdn.com/files/45d6a031-44cb-44c7-9b2d-1280cdbd5462/99182910735.pdf
    • https://uploads.strikinglycdn.com/files/e3c2ce45-504a-47fd-bab6-51f07024bc4f/gdp_and_national_income_difference.pdf
    • http://pepawelifebin.rf.gd/gutagiwazuzigupexofo.pdf
    • https://033f1a72-e514-447f-b44b-9d234b37386c.filesusr.com/ugd/f05202_804bf57986094cd898eb967bb0419ec7.pdf?index=true
    • https://s3.amazonaws.com/viwoxuz/51446759437.pdf
    • https://s3.amazonaws.com/remavuj/zojola.pdf
    • https://8dcf3d85-40eb-4350-b789-ae6ac2c46e24.filesusr.com/ugd/21d17a_9bf3ea8107f44534a6a0fb14b96e200d.pdf?index=true
    • https://d73c234d-0e3d-497d-8108-d5659bace061.filesusr.com/ugd/58a813_650ff2f71cb7456a936da02f31117214.pdf?index=true
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_bc5fe399c9fc48ec9c1a03532f385f99.pdf?index=true
    • https://uploads.strikinglycdn.com/files/564bb1fb-6a68-4f8a-886b-d18e99d017d4/97034447903.pdf
    • https://s3.amazonaws.com/xijilesuzuxo/9110167976.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_off0000ec82.bin
f919c3b31bbc584ff35055e86e8b2fa0b65a141c1363d5c213ffac47a7a808a1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC82 5312 bytes
font_01_sfnt_off0000fe80.bin
e1ec78bf47b4c970d1d32723cf33ad106c541215eb76dc45d9128829eb3c5b2a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE80 11012 bytes